Not sure if this is 100% scientifically backed but I read a bit by a dental hygienist on a forum that you shouldn’t rinse when brushing with proper toothpaste because it can help remineralize the teeth if when its not rinsed away after
Its annoying but its a good way to cut down on mindless snacking at the very least for me so its something I do sometimes. Hope its not voodoo
they way you brush with an electric toothbrush has almost nothing to do with how you brush with a classic one, so you can get right to work learning to do it healthy. The ones that give you “pushing too hard” feedback are now also in the lower budget segment, so you should be just fine :)