Janet, my suggestions for you are:
-- borrow some bikes from friends and/or neighbors - bikes that fit you physically - and go for short rides, exploring areas near you or where your friends live who loaned you the bikes. How do you feel about riding some distance? Is it what you want to be doing? The more/less you answer 'Yes', the more/less you should invest in a bike.
-- definitely try out some ebikes, as they all feel unique from one another and we all seem to have our own 'take' on how they feel to us.
-- and if you're pretty serious about taking up regular riding, ask around (bike shops, folks you know who are regular 'bikers') to see if there isn't a community bike resource of some kind, where you can tinker a bit with bikes and can try out different bikes. It will give you a feel for what it means to maintain a bike (something all riders have to do, at least in some basic fashion) and get you exposed to all the variables that make up how a bike feels. (
Here's the one in my small town, just as one example.)
Good luck to you!