When I have the lens set on A, can I still use the zoom ring
on it, or will it harm the lens, or do I have to put in on M.

Sorry if silly question just trying to work out these lens, its
a bit confusing. This is my first SLR and it is a bit frustrating.

I was trying to take a picture of a parrot this morning and it
wasn't zooming in, so used the ring, but then thought I had better
ask in case I damage it.

Cheers
couchie