New to CFW, Now what?

Hey guys,

Complete noob to the hacking and modding scene. Got my self a nice clean silver fatty PS3 from Japan on the cheap. It fully works and have installed CFW onto it.

I have no intention of playing any online games. Or even being signed into the PSN network while playing single player games.

I have loads of PS3 and PS2 and PS1 games on disc. My intention is to back up my favourite games onto a 1tb external SSD using muliman.

So I fully know there is going to be some risk. But there are plenty of games I never played on PS3. That has trophy support. I would love to play these games collect the trophies offline. Then basically connect to the network to sync the trophies and then go back to offline mode every so often. As I understand is their is always a risk but but there are fairly safe methods to do this.

Can anyone explain to a noob like my self. How I can as safe as possible connect the PS3 online with my account signed in to then sync trophies and then go back offline and earn more trophies?