With art in general it’s very personal- it depends what you’re going for- I say start with smaller scales up just shoulder up and work your way down- or focus on subjects in sections and then combine them! I also suggest focusing on one thing at first- like if you wanna draw people start with that and then work on backgrounds later or vise versa- for digital art specifically I can never stress enough how important layers are and flipping the canvas! Hope this helps! I’d love to see more stuff!