u/NeEKire

Me and my friends are visiting Genoa this summer and want to travel to Nice for a day. Whats the best way to travel to from Genoa to Nice and back? Train or rent a car? If train could you please provide more info like some website for tickets,cost,time etc. If by car aproximate cost, where to rent etc. Also what are some nice beaches for young people for swimming and getting a beer in Genoa? Thank you