I learned using youtube. Its a slow painful process.
Sebastian Lague - you may want to watch his newer videos. He has become much better with more experience. I believe he has a Patreon account. I learned animation from his videos, and I think I make decent looking animations for not doing it that long. He has some great tips.
Alimayo Arango - Again - watch his later videos. He is actually really good teacher - with lots of tutorials.
Darren Lile - Very good, very informative, very slow paced. He has his own website or is partnered with someone. I didn't subscribe, but never say never.
VscorpianC - I don't know if she is still active, but worth watching.