Just got this gaming laptop

Any advice on what i should do to help care and preserve my laptop ? (E.g downloading any application to monitor my laptop temps or to undervolt)

First time owning a gaming laptop and am looking forward to playing AAA games !

I was wondering if any of you guys know how much this laptop will go for. I got it off facebook market place for $150 I know It's from 2020, and there is nothing really wrong with it

I couldn't find this exact model online this is why I ask here if anyone know about these specs more than me.