I'd actually say that Skyrim is a bit too close to BOTW from a gameplay perspective. While they are clearly different games, the thematic and gameplay overlap is there. So rather, get an entirely different game like MariO, Mario&Rabbids, Doom, Disgaea, Splatoon 2 or Golf Story. That way, when you grow tired of one, you can switch to the other and still have fun. Playing two open world RPG-y games at the same time is a bit too draining, in comparison. I think.
Of course, be prepared to eventually get Skyrim.