You're afraid of crashing on the road, but you'll ride no handed on rollers?

It's a lot harder to ride no-handed on rollers.

I suggest finding a grassy field if you want to learn to ride no-handed.

I'll disagree with all of the above and assert that riding on the rollers does just about nothing for improving riding on the road. Riding "smoothly" really is much ado about nothing. You want to improve your handling skills, you need to ride on the road. Nothing about riding on rollers is really equivalent to that.