I'm helping a friend of mine who wants to join our party make her character. All she knows so far is that she wants to be a Tiefling. I'm still fairly new to the game myself so was hoping I can get some recommendations on what to recommend to her for a class. So far in our party we already have a bard (me), a barbarian, and a druid. She's a complete novice to D&D so I wanted to help make her character as straight forward as possible, if that makes any sense. And before anyone asks about running things by our DM, our DM is being pretty lax when it comes to our characters, so whatever is fine. I just want her to have as much fun as the rest of us. 

First of all, I would avoid Cleric and Wizards. Classes that prepare spells tend to be more technical to play, simply because it requires being familiar with your spell list, to know which spells to prepare each day.

If she wants to cast spells, sorcerer and warlock should be fun (my personal preference goes to warlock, but that's because I find sorcerer underwhelming in this edition).

Otherwise, I would probably offer, in order: rogue, monk, fighter.

Although my best advice would probably be to simply let her look at the class lists, and let her pick the name that sounds the coolest to her.

Also, as a DM, I would probably give her a free +2 to the main stat of her class (unless it's charisma), so her character has more chance to be efficient.

Alright cool, thanks! Pretty much everyone in our party is new to the game, as we haven't even had our first campaign yet. The only reason I'm helping her is because I'm the only one so far whose gone ahead and bought the player handbook/watched some youtube videos on the game. Plus, I was also the first one to complete their character, so I have some semblance as to what's needed. 

I intend to let her do whatever she wants with it, as I did with another friend of mine (same party) the other day, I just offered some guidance as to what's included when making a character. Just needed some advice in case she asks for a recommendation for a class/spells/skills/etc. Guess I'll study up on each of the classes you recommended first so I can better help her choose. I did give her this site to explore for now until we get a chance to meet up and flesh out her character, so hopefully that'll help out. 

Again, thanks for the advice! It's really appreciated!

Prepare casters aren't that difficult, but Wizard adds another layer to it which has definitely confused a lot of new players (simply based on all the false bug reports from not knowing how to do it). My first character was a cleric, and the hardest part was only having 2 spell slots per day.

But yeah, sorcerer or warlock are good choices. But they could be a rogue or fighter if they want too. Or even a second bard. I find party comp is pretty flexible as long as you have someone who can heal (even just 1 spell, doesn't have to be dedicated healer) and someone with high AC/HP.

Big consideration would be what type of play style she favors.  This edition you can pretty much play any class with any race combo without too much drop off so it's more what does she want to do?  Personally Tiefling sorcerers are pretty awesome, but if she's more of an in your face type go with a paladin, doesn't want to mess with spells go rogue or fighter, lots of options out there.

This flowchart can be used to help determine what class would be best suited to her play style
https://www.lucidchart.com/pages/flowcharts/which-dungeons-and-dragons-class-should-you-play

A tiefling can play any class reasonably well but if you want to be as powerful as possible Paladins, Sorcerers Bards and Warlocks take advantage of the +2 Charisma (though as ClementP said an easy going GM might allow her to add +2 to her main stat either instead of or as well as Charisma.

Being able to prepare spells daily isn't really an issue, most of the time you don't know what you are going to face that day so keeping the same spells each day most of the time isn't an issue, (and if you start crossing the desert prepare create or destroy water before you run out).  I would in fact say daily preparation is an advantage for a new player because if they find a spell isn't as useful as they thought it would be it is easy to swap it for something else.

I would agree that wizards are hard for novices to play but would add bard to that, being a bard effectively requires quite creative use of spells.

Thanks for all the suggestions guys! I'm meeting up with said friend today to help with her character and this all really going to help out. My other friend already had an idea what he wanted to do with his character as he also was already familiar with the game so we spent a lot of the time messing around and what not. 

I'm probably going to suggest she either go Warlock if she's into mages or fighter if she wants to punch our enemies square in the face. I'll need to discuss with our DM about letting us swap spells if we find they're not what we originally thought they would be because as I said, everyone in our party is a novice to the game aside from our DM lol. But again, he's been really cool about everything. You should hear some of the characters we've come up with as I'm fairly certain they aren't the most traditionally lol. 

Seeing a great community like this is getting me all the more pumped to start our first campaign!

I'm pretty new myself, but decided to cut my teeth on running a game for my three kids.  I hadn't messed with spells at all up until my daughter chose to play a Tiefling Paladin.  I thought the combo was interesting, and we've had a lot of fun with it.  My daughter is 8, and although we are only lvl 3 now, she has no problems, choosing, preparing, and casting the spells in the Paladin class.  I took me about 15 min to learn how they work, then it's not hard at all.