Good luck - I didn't play let alone gig for nearly 10 years. " Hey , let's get the band together for a one off charity gig!!"
I wasn't keen , but we did it , about 30-40 mins I think. I was bricking it, and would've run away if I could've.. However, it was a blast and we were buzzing/rattling, and we're still doing it , as best we can ,5 years later. We've even learned some new stuff!!!
All the best - Have Fun(der)!!