My Dd was always good at art and practically taught herself digital art when she was around 13. Check out Deviant Art (people post their work and others give advice and encouragement).
She went on to take art at sixth form then an Art Foundation at University, followed by an art degree. She went down the designer route as mentioned by photo dad.
She was very lucky to get an intern (but paid) job in the summer and was taken on when she left uni. The company is not a design one but they realised they needed an in-house designer rather than using freelance designers.
She is mid twenties and is on (I think ) a fabulous salary for her age.
She is very passionate about always working to her best ability and works very hard for them.
I don’t know if she’s been incredibly lucky (right place, right time) or if that’s normally possible for someone with her talent and drive.
The existence and need for all types of “digital art” I think has opened up a lot of well paid opportunities. Obviously there’s a load of different software you now need to know and I expect it keeps changing.
The best thing we ever did was buying her a Bamboo tablet (I think that’s what it’s called) When she was about 12 ish. It cost about £200 back then, which at the time I thought was too much to spend at her age. How wrong I was. When she was at uni she upgraded to one that cost about £2,000. Again it was money well spent.
PM me if you want any more details. I only know about her and what she did. Perhaps speak to careers teachers, etc etc.