Welcome to the forum jacquie
Glad you could join us.
As far as gas or E-bike?
How far will you be traveling? I think most E-bike's go around 20-30 mile's on a single charge. The other member's got most of what you need to consider.
I would also check your law's where you live. E-bikes are more accepted then gas bike's. In many states motorized bicycles fall under moped law's, which then you have to have insurence and registration. Here in AZ we just have to stay under 20mph.