Trekking, Town and Hybrid eBikes are great for around town, commuting, country lanes and general exploring. They tend to come with all the necessities that you may require. We're talking practical things like full length mudguards, lights built in, pannier racks to carry luggage and side stands. They are also built around comfort for long durations in the saddle.
Commonly you'll not have to add much to a trekking / touring bike as it'll come complete with most of the parts you want. It may also be worth considering a decent set of luggage bags and also a good lock for securing the bike and peace of mind when not in use.