is there a way to get animate dead as a warlock?

I don't think so RAW. There is a UA patron (Raven Queen) document out there that adds this spell to the warlock's list.  

Also, I don't see these as undead per se and therefore not the abominations some of the earlier comments make them out to be (depending on the deity).  These are puppets, not much different than animating objects.  

Duplicates until main one is defeated

i think it would make a full skeleton because you can use this spell on a single drop of blood.

Quote from LEGOman18392567428094785 >>

i think it would make a full skeleton because you can use this spell on a single drop of blood.

 The spell description requires "a pile of bones or a corpse of a Medium or Small humanoid within range" so I don't think a drop of blood would be enough.  That would be awesome though as a homebrew change.

they arent going to be in your comand tho

I learned that the skeletons I summon with this spell can attune any item and I started looking at armor that can be attuned. It says that you can cast the animate dead spell on the armor of the fallen armor. Can a skeleton summoned with animate dead cast the animate dead spell? :] If summoned, does the newly summoned skeleton listen to the commands of the summoning skeleton or the player?

Alternative spell (homebrew) for any cleric - Channel Soulbound Wisp.

As a cleric-player, I would love to have at least one spell to conjure a creature for a cost of 3rd level spell slot and not being burned in a village at the same time. Many words had been said about availability of this spell for all clerics. Anyway, if you are like me, do not hesitate to use the spell in your campaign :)

Quote from DARKTIT4N >>

I learned that the skeletons I summon with this spell can attune any item and I started looking at armor that can be attuned. It says that you can cast the animate dead spell on the armor of the fallen armor. Can a skeleton summoned with animate dead cast the animate dead spell? :] If summoned, does the newly summoned skeleton listen to the commands of the summoning skeleton or the player?

I would not say the skeletons can attune to any item — for instance, they don't have a class, so they can't attune to something that says something like "requires attunement by a sorcerer" — though I suppose they can attune to Armor of the Fallen since it doesn't have any attunement restrictions. In which case, yeah, I guess they can cast that spell.

I think the way that would work is that you would have to use your bonus action to command the first skeleton to use its bonus action to command the second skeleton to do something.

So, level 3 spell you get 1 undead,
level 4 spell slot you get 3 undead,
level 5 spell slot you get 5 undead,
level 6 spell slot you get 7 spell slot undead,
level 8 spell slot you get 9 undead,
and level 9 spell slot you get 11 undead. 

Skeletons could leave a bag of holding. Not to mention they could destroy the bag of holding from within.
You could animate a skeleton have it in the bag and transport it about for the 24 hour period. Keep it in the bag and every morning have it come out and recast the spell.

You could make one for the "Crawling Claw" if your DM allows. 

Feasibly you can have it so it sticks a muzzle on itself or puts intself in a pit for the 24 hours, and feasibly, you can also have your undead put leashes on non tamed undead 

Could you use Animated Dead to make a Skeleton Warhorse? Or even just skeleton versions of animals?

Quote from SorrowfulCheshire42 >>

Could you use Animated Dead to make a Skeleton Warhorse? Or even just skeleton versions of animals?

No, because the spell says you need to cast it on the corpse of a small or medium humanoid, and horses and other animals aren't humanoids.