I’m new to ebikes and have decided it would be great to have for easy trail riding and around the neighborhood. I’m 68 and haven’t done much bike riding in years. I am athletic but in terrible shape . I do not want to spend a lot since this my first and I don’t know how this new sport for me is going to go. I need comfort as I’ve had spine surgery and rotator cuff issues but doc says I’m ready now. Suggestions?