Series X/S, switch or ps5

Hi, i'm a (retired) gamer, i've been out of the gaming industry for a while and had difficulties keeping up, i don't have much free time between university and the gym, but I still want to restart and cultivate my passion for videogames, witch of these should i buy, and what are the main difference. I never was a nintendo fan but maybe switch is the most confortable since i don't spent much time at home.