No need for an oil change unless unheated storage and been a year or so. Don't start it unless your going out for a ride. Better to let it set, moisture generated while you run it sits in the oil making acids.
Below is an RT after ten minutes idling. Stories about people going for a cup of coffee and coming back to serious trouble. Battery tender brand motorcycle chargers say in their on line paperwork not to use them for extended constant charging. There are other brands that are good for that duty though.
Mount Vernon, WA.
tire guy, I'll mount your tires.