ARTISTS OF MANGAGO

Recently I've started practicing drawing alot more then before because FUCK AI and I really just want to make some animations and art of my favourite characters (and hopefully make some money as well. I know it's a highly saturated field uuuggghhh) Thing is for a long time I've been really good in drawing by copying references but I CAN'T draw with my imagination. All the creativity and the imagination just flies out of the window as soon as I point my pencil on paper. I've been getting a tiny bit better on portraits but general anatomy STILL SUCKS. And I can't figure out how to get better. I know it's a slow process but it's still frustrating. Also the fact that there are so many sources that it's just hard to decide what to even start with. I've been practicing basics and all but applying them in anatomy is where it all falls flat. Any advice, any directions, a video or artist recommendation, any book, literally ANYTHING will help. It doesn't even have to be about anatomy only, any art advice honestly. I remember asking a question about portraits as well several months ago lmaooo. So yeh.
Thankyou so much to all everyone who replies btw <3<3