I didn't start riding until my 30s. So damn nevious, I kept stalling the darn thing.
I'm 65 now and I still get nervious, not because of inexperiance, but because there is so much out there that can harm you.
The day there isn't a little nerviousness coming from you is the day you need to watch out. Get experience. Remember to ride safe and be alert.
Remember there is nothing between you and everything else out there.