I personally learned on my own+followed advice from fellow artists. I'd say drawing is mostly practise and figuring out what's better in your style... also I feel like studying anatomy would be good in your case, I follow this guy on yt @excaliblader
Has really good videos about anatomy while showing muscles and bones
Edit, I just saw your newer animes, I think ur almost good😭 (like, anatomy wise. Could be cleaner tho but I know theres too many frames obviously)
