Ι second everything said before 

A couple of other things you should think about is actually understanding that you may have forgotten how it's like to perform in front of other people, which is great and thrilling as well. But sometimes, if we haven't done so for a long time it can be confusing, make us feel nervous or even get distracted

I would either practice on "how not to get distracted" by anything going around while I would practice. I understand that there can be lots of methods, either looking at your instrument, your hands, or looking at nowhere with an empty gaze.

Some of these could also be distracting so you should find out which works for you. I would also ask some friends to attend an informal "rehearsal" and ask them to be noisy if they like.

OR (/and)

you just make it like rock n roll. Enjoy everything. 

Either way good luck, and congratulations for picking up the violin again