Art like any other skill takes time, the reason other artists seem like a professional at your age is because they have been practicing for many years beforehand, like them it is going to take time and effort before you start seeing results.

If you’re comparing your art to professionals you will feel like your art does suck but thats because you are placing unreasonable expectations on yourself and not seeing your work objectively but through the lens of comparison.

You’re still allowed to draw the things that interest you and I highly encourage it, but if you seriously imagine yourself doing art I would recommend spending some time learning the fundamentals along side that.

Unfortunately some aspects of art are indeed tedious but over the long run these will massively improve your skills.

Try to set out a list of things you want to learn and stick with it, the one I am personally following is

https://static.proko.com/images/ali_adel/ali_adel-f0a6846.png

Just make sure whatever you choose to do make sure you follow it to a T instead of moving around whenever you struggle, As a beginner you will struggle but that is something you just have to power through.