Hi, I use Jaimie Jones brush set there's this one rectangular texture brush that I always use from his set. Other than that just the regular hard round brush for fine detailing.And I studied my anatomy and stuff from a ton of you tube tutorials as well as george bridgeman and andrew loomis anatomy books. Other than that I tend to observe a lot of artists works that I admireand try to break down their techniques (i.e how they got that painterly/detailed feel) and use it in my painting process. But yeah just draw a ton and observeI hope this sorta helped haha