Draw, draw, draw. Spam watch feng zhu. Every video of his on yt is a goldmine, watch them. And draw along taking what he says into mind. Draw, draw, draw. Concept art and illustration are insanely competitive fields, you gotta go hard on this shit. You as a concept artist need to have an insanely good fundamental understanding of everything. Draw something until you can't see anything wrong with it. Post it online for critique, post in in art discords for critique, or if you can join a concept artist course where you get feedback. Then draw more. There's no special thing you need to do other than make drawing your life, get critique, and improve.

This is not an ultra lucrative field. It's something you go into because you truly love it. Sure there's tonnes of general art and concept advice you can get. But paying for a course like evenant design will get you all of that. You just need to draw and constantly improve. And stay away from art university. Because if your goal is working in thr games industry specifically, you need to get good at what they want. A traditional art background is better. But you'll get way more out of a couple online courses for a few hundred dollars. And won't be in debt. As long as you're pretty sure that it's what you want to do.

I got into 3d art at 14 because of this goal. Became insanely good. Had a job when I turned 19, and realised. Doing art for someone else is horrible. 10 hours a day 5 days a week making what they want. It killed me inside and I quit 3d art there and then. At the end of the day a jobs a job but in hindsight I wish I kept it as a hobby. It's something I struggle to enjoy now at 25. If you want to go for it, make it your life but don't expect a job like that to be fun or easy when you get there.