Weird for me to comment on this over a year later but I just want to say...

I look at other peoples' work to inspire me! I get new ideas, I change my style slightly when I see something I like. If I'm having trouble with something, I take a break, look at some other art and photos, and come back to my picture with fresh eyes. It always helps.
You have to try not to compare yourself to any other artist! I know it's hard, but the only reason most artists are as good as they are is practice. For some people, it comes more naturally [I know many artists who are half my age and twice as "good" as me], but "talent" is a myth. The brain works in different ways for different people, so some people have an easier time learning form or shading or anatomy or whatever and there will ALWAYS, ALWAYS be people "better" than you. I don't really subscribe to the idea that people are better or worse at something like art, logically it doesn't make sense to me. It's the effort put into things. Art is subjective and as long as it's appreciated by at least one person, the artist themselves included, it's worth something. If it brings a smile to one persons' face, or helps the artist feel better, or invokes any emotion at all, it's so worth the effort.
But regardless, most artists who take commissions [myself included] have put tens or hundreds of thousands of hours into improving their work. It's not easy and it's not fast. Nothing ever is if it's worth working for. Relationships, jobs, hobbies, pet or child care...you name it, if, to you, it's worth working for, it's that much easier to appreciate what you're working toward. I started out doing dumb little doodles of dinosaurs and horses when I was in kindergarten. Once I decided art would be my life's work, I started all over again from stick figures! That was 16 years ago now, and I've been drawing almost every day since then. Plus, I still do the same dumb little horse and dinosaur doodles as I did in kindergarten [which was 24 years ago].

That all sounds really discouraging, I know, but if you're passionate, find a way to make it fun. Always keep every sketch you do, even if you think it's horrible. It's something you'll be able to look back on in 6 months or a year and be proud of how far you've come. Even if you don't see the improvement yourself, it's there. The more you draw, the more you'll be able to see your improvement.

I've seen your art and you absolutely have the capacity to be really wonderful, with very little practice tbh. You have a good grasp of anatomy and expression already! Those are two of the most important things. You're better technically now than many artists I've seen successfully taking commissions. But until you're fairly confident, it's a good idea to wait to take commissions. If you take commissions before then, you work and work and possibly overwork every picture you draw for someone else. Sometimes that makes the picture better, sometimes worse, but it ALWAYS means you spend so much time on it that you make less than minimum wage. I still do that myself, with almost every picture I draw.

You just have to put those hours in. I'm bi-polar so I know how anxiety or depression can affect your drive to do anything, but as long as you look at it as a hobby, something therapeutic or something you just like to do, rather than comparing yourself to artists who have been drawing every day for over 10 years...you can get past that hump and just work on improving. Make goals! Draw little gifts for friends, people you know will appreciate it. It's great motivation. Regardless of what you do, you'll make someone smile. Doodle little figure drawings based on any picture you can find. I can link you some tutorials if that would help! For any artist, at any time, there is always something to learn. There's always a starting point and there's never an ending point.

The best time to plant a tree was 20 years ago. The second best time is today. :)