The imagination and skill is already there.
Artistic expression comes as natural to some as being able to swim. At the same time, it's a perishable asset. A person can push themselves for decades to keep persuing the dream, but that flame can and will burn out eventually. It helps greatly to stay surrounded by people who help bring it out, be it a spouse, friends or even an employer. I'm beyond blessed to know the people I do and to have landed where I did. Crazy friends are the best to keep around.
Quoth nobody in particular; It's your brain. Use the hell out of it. The worst that can happen is that you'll get smarter.