but i'm asking about digital art tips, not general art tips, cuz i know how to draw, and i'm happy with how i draw. digital art seems complicated for me, cuz they are so many different tools and settings. and I thought maybe someone more experienced could advise me
you're going to get so many awful replies XD digital art is still so controversial.
honestly find digital artists you like online (from wherever!) and try and copy elements of their style you like - try to have a goal when you're drawing something (like you want to copy an artist's style of lineart etc.) doing traditional art can def help with the basic stuff, like ur anatomy and 'art style' (ewww art styles :p) but the only way to learn digital art is to practice it, so draw loads and you'll make up your own tips n tricks eventually!
edit: Sorry! I didn't read your whole post!! this might come across as like beginner advice, but drawing digitally is so different (to me anyway) it is kinda like relearning! I would recc trying other painting programs too - like ms paint - and seeing what suits your style!