However, the nice thing about bikes is that, mostly, they are shed maintainable.
I would say stick to a hub motored bike with no fancies (who the bloody hell needs blue tooth on a bike?).
Best of all, find a bike you like the feel of and convert it yourself. You end up with a bike you know well and most, if not all, niggles can be worked through/around with help from the enourmous knowledge base on this forum. If you buy a complete kit it will be plug and play - it's what I did 6 years ago and I've done some 8000 miles since.