Easy conversion kit with just pedal assist?

I just moved to the top of a hill and it feels like the right time to pull the trigger on converting my hybrid to an ebike. I don't want ultimate power or speed, just to make it a little easier to get home after a long day at work. I'd love a cheap and easy kit, but I could DIY a retrofit to save money and keep my build clean—I just don't really know where to begin.