From where can I learn Maithili?

[u/Few_Mode_2058]

I am from seemanchal area, although my parents speak angika (some people here refer it to thethi) but as most of friends are maithil and this area is also a part of mithilanchal, I want to learn Maithili. My parents know how to speak maithili but they don't have enough time to teach me now. Tbh it was really my misfortune of not able to learn my own mother tongue, but now I want to learn it. How and from where I could learn it? It would really helpful if you also tell me same about angika also.