Sims 4 - Stupid questions

I thought I'd start a thread to ask your dumbest questions about this game, because I have a few myself.

Can you start a new game without creating a new sim? I just want to go in and play the Goths.
Tweakbox Appvalley vlc.onl
How do I switch between families when playing?

How do I turn auto save off?

I got this,...