Hey started to pick up 3d 2-3 years ago with no artistic background, I’m now 42 and I launched my 3d design company in january this year. Already a few clients, but not yet enough to pay for the electricity (which is normal when starting a company, starting takes time unless you get really lucky). Even with limited skills, there are already people willing to pay for what you can do, granted, it takes effort to find them, but there is.
If your question was just about 3D as a hobby, then age is even less relevant.
The key here is to enjoy it to the fullest even if sometimes there are moments of doubt and discouragment (the learning curve is steap like Blaine said).
One thing that helps me keep going is: I have this project I did when I started with blender, this same project I’m revisiting every year by doing it from scratch. Then I compare the results and man it’s mindblowing how much you evolve in a few months even if you feel you plateau. I found this a good way to keep going.
