Hey there! I don't know how useful it'll be, but I can try to give some advice.
Personally, I've been making digital art for a while now, and still am constantly trying to improve. I guess you could say that part of it is 'practice makes better', true, but one of the main reasons why I didn't progress much in my earlier times of digital art was because I didn't expose myself to other peoples' methods.
I think it's important to watch lots of tutorials by people who are very confident in their own methods. Depending on what you're looking for, there can be some really good ones out there. The goal is to find exactly what works for you in terms of work ethic. While looking through tutorials, it's important to take whatever advice is being given rather loosely. What works for them may not work the best for you; but that doesn't mean you shouldn't try out whatever methods you come across. Give anything and everything you see a chance. Your ethic could be similar to another artist's, or it could be a unique conglomeration of many different kinds.
In short, being able to do your best isn't easy, and of course it takes time. It can be frustrating at points; but it's up to you to keep yourself moving. I, personally, still haven't found my digital art forte, but I can see myself improving. Try not to rely on professional equipment too much; it's there for you to use to your advantage, not to confuse or frustrate you. (Spend extra time researching every function of the program you're using, as well)
I'm not sure how useful that all is to you, and I know it's a lot of words (I do that a lot whoopsie). Of course, I'm not the digital art expert. Take whatever advice you think suits you the best ¯\_(ツ)_/¯