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What do you want to accomplish? traditional art or digital art? 3D sculpting? animation? You're asking me guides for goals you never shared. I could point you to anime style but what if anime style isn't what you're interested in.

Well I’m not looking for a career in this, but I want to accomplish this as a hobby. I want to start with anime style and then to 3D

Marc Brunet, SamDoesArts, Mikeymegamega

Their youtube channels are mainstream on the subject. I don't watch their channels as often as I used to because there are niche artists I prefer to follow. They are good starting points.