Not bad not bad! If I may...
Overall your proportions aren't bad. Everything is fairly symmetrical. There's a little wonkyness with how the arms attach and some discrepancy in length, but other than that it's pretty good. I do notice that the body just keeps getting bigger the lower it gets so remember to check how each section relates to the other parts.
Face isn't bad either. Really the only thing that bugs me is how the closed eye is super high. When eyelids close they close down so the line there should be at the same level as the bottom of the other eye. Ears are in a great spot and the golden triangle (the invisible triangle between the eyes and nose) is good proportion.
I like yo booty wings. (◔ᴥ◔ )
Here's some general tips from me:
Even though I'm SUPER GUILTY OF THIS I also find it hard to get my proportions right when I draw the whole head first. I know it's super tempting to draw the face first and draw the rest around it but unless it's a neck up portrait, I find my everything is better when I draw out the general shapes of the entire pose first before working into details. Like, my original sketches are the messiest pieces of garbage but those are only a starting place. (YAY for digital!)
I also agree with the advice here that references are your best friends. Even when you're doing a stylized/ cartoony drawing, it helps a heck of a lot to know what the actual body parts look like and then translating those into the style rather than the other way around. I will also say though that you don't have to spend hours and hours grueling away at super realistic portraits. Use real life references but draw the way you want to draw because honestly if something isn't fun why do it yeah? Whatever keeps you drawing, that's what you should do.
One practice tip an old instructor told me to help with basic anatomy is to trace over real photos just to get a feel for what it's supposed to look like. Now I'm not saying trace over them for an art piece because that's stealing. I'm saying trace over them as a study. Get used to what arms and legs do. Get used to how the mouth lines up with the rest of the face. Get used to how the nose looks in profile. Just... lots of different angles and poses. When it comes time to do the real thing you're gonna find it a lot easier.
Speaking of the real thing! It helps to have lots of different references when drawing because a better understanding of what the thing looks like in 3D will help you to draw it in 2D. All drawing is is learning how to erase the symbols our brain uses to interpret what things are and learning instead what they actually look like. Learning to draw is actually learning to see.
Also! If you intend to keep doing lines in digital I recommend either getting yourself a tablet (doesn't have to be an expensive one, there are some really decent ones out there now that are inexpensive and have good pressure sensitivity) or learning the pen tool. Will make crisp and clean and super fun. (◕ω◕✿)