learn new things

I would really like to learn how to sign.. sign language. And I really LOVE to learn photography. But… due to age & Fibromyalga I’m not sure if I can remember how to do either of these. I have always heard “your never too old to learn” but what are my limits?
I wanted to dance again but found out my energy goes too quick to do that. makes me sad. So guess I’m afraid to try cuz I don’t want to face failure again.