For me I needed to get this "having fun" concept out of my head, my goal and primary focus was to remain Sober, this is life and death, drinking will only cause misery, Sobriety will give me a chance at happiness!!
Forget about what everyone else is doing and focus on what's important to you, for me it was remaining Sober at all costs!!
"Doing nothing" is remaining Sober, and if that's what it is gonna take for the next few weeks, months, then that's what we gotta do, there will be plenty of time after that to venture out, but for now it's all about being Sober, strengthen those Sober muscles for the future!!