I've been interested in DnD for a while, however, as of current, I'm mute due to some medical issues. So is there a way to find a group for DnD while also not speaking? 
Not sure if it's relevant, but I'm also a minor. 

The easiest way would probably be to find an online group that does play-by-post or types posts in Discord.  Try checking the looking for players/looking for games channels.

Check Meetup - I'd let you come to my group if you lived near me (only play in person using Meetup), but you could just write your response, else have pre-written cards, "Attack" > "Spell", or "Search" or "Cautious" and other cards readily available, "I need to write..."  or "Hide", etc. I use these as DM for notes:

As Lyran said, the simplest and easiest route would probably be a Play-by-Post, since there is no element of speaking by its nature. There is a forum on this site for that, you could look there.

It's quite possible that you might be able to find a table that will work around your challenges. I'd be willing if you came to my table. I'm not sure how easy it woukd be to find a whole table of willing people, though. The card idea above is good. Ideal wouod be a text-to-speech program if you're capable of typing fast enough to make it work well. I guess with time that skill would develop and it would come. 

You make your condition sound as though it's temporary. I have no experience with that kind of thing, so O don't know the scope of it timewise. If it's pretty temporary, like it would only (I say only, even a few days must feel like an eternity!) last a a campaign or so, I'd go for PbP. You don't need to learn special skills, and you can participate seamlessly and fully in the game. If it's fairly long term and PbP doesn't appeal to you, I think Text-to-Speech would be the best option, since it will allow you to play almost as though you had a voice. The cards are a good alternative if you struggle with typing,many they have a charm of their own, I think - but they would likely be quite restrictive in what you can easily say, and certainly embellishing your narrative would be problematic. However, you can use them humorously and you'd have a unique (in a good way) identity at the table. 

Those are my thoughts. Hope they're useful in so way.

The link for the PbP forum here on DDB is:

https://www.dndbeyond.com/forums/d-d-beyond-general/play-by-post

I've never played PbP, so I make no assertions as to its quality etc.

We've had online sessions where someone needed to use text instead of speaking, due to some microphone issues. If the people you're playing with are tech-savvy, it's easy enough. I use Roll20 and it has a chat feature that's integrated with its dice feature, so nobody's going to have it turned off or minimized. It may take a little bit of time to establish the rhythm of it. I find that sometimes people will pause when they see the "X is typing" message, and sometimes they won't, for example.

I'm also playing my first PbP game, and I'm enjoying it. The upside (and downside) of this style is that you can take the time to compose exactly what you're trying to say. (I have to remind myself not to write too much though.) It feels less personal, but if you're really nervous or something, it seems like a good option.

In-person play, idk. You have the benefit of people being able to see your face and body language, but unless you're already extremely skilled in nonverbal communication this'll probably be the hardest. Unfortunately you'd be picking up the slack for everyone else -- I don't think I know anyone who can speak sign language, for instance. But it's not illegal to have a tablet or something at the table you can use to show text.

I'll agree that it wouldn't be disruptive in the typical online game. We do roll20 as well, and it's easy to chat (and emote) instead of talk, and you can use macros or DDB integration with Beyond20 to announce attacks, spells, or other rolls.

I suffered a vocal cord injury back in 2020 and lost the ability to speak for about nine months. I played D&D via Discord and forum posts and narrated all my in-character dialogue and out-of-character comments with text. I also ran my own campaign as a real-time play-by-post over Discord. Made combat and RP scenes a little slow while people typed things up and/or waited for me to type, but it was perfectly doable and plenty of fun for everyone.

If you're at a physical table, typing/writing things, using cards, or using sign language (official sign or gestures you innovate) can be easily implemented. As long as your table knows about your limitations and how to accommodate you, there's absolutely nothing stopping you from having just as much fun as anyone else. You can even lean into it and play a character that doesn't talk much. A legacy kenku, a monk who's taken a vow of silence, a chatterbox bard cursed by a fey prince to be a mime...

Quote from Noukt >>

I've been interested in DnD for a while, however, as of current, I'm mute due to some medical issues. So is there a way to find a group for DnD while also not speaking? 
Not sure if it's relevant, but I'm also a minor. 

 Others said it - and I'd echo the same.

Play by Post, is one of the methods.

There's also people who do Play By Email, which operates just like Play By Post.

And I am pretty sure there's probably some Discord Servers that operate in a similar fashion (for example - https://disboard.org/servers/tag/play-by-post )