Oh yeah, DnD is a great idea, and if they aren’t into dragons (but who isn’t) there’s all kinds of variations of rpg games. Mutant Year Zero, Vaesen, Alien, Pathfinder, Starfinder, etc. The list goes on and on. And since you have mentioned you have a pc, you can use a virtual tabletop like Fantasy Grounds, for them to play where you don’t have to get them all together in the same room. I play a few different games each week with people I have only met in game. You could buy the FG Ultimate license for one pc, whomever is going to be the DM, and all the other kids could connect with the free beta license, and only the DM needs to own the books. Everyone else can just get on and read the manuals, or play the game with no expense.