Hey , I just had my first stand up a few months ago, I got on stage and started joking I was nervous real nervous, the guy who introduced me sang a very depressing song before I came in making the whole atmosphere gloomy and sad there I was trying to make a bunch of depressed people laugh haha. I ended up doing around 40 - 50 min of stand up and people liked it a lot but things didn’t start off as good as they ended.
There are several things that I recommend.
First of all don’t be nervous if you’re nervous joke about it , that will relax you a bit. But the worst thing you can do is show insecurity.I was nervous at first and no one seemed to laugh, the more they didn’t laugh the more I was nervous. I had to improvise a way to relax without the audience noticing, what I did was I threw in a joke that involved death and acted the death part out… while “dead” I had a good 10 seconds to relax and “start over”
After that the show went great, people laugh if you laugh its a psychological thing.
I agree with Phil what happens in the first show stays in the first show, don’t worry if you mess up people usually don’t notice and we tend to make our mistakes bigger in our head.
What I do recommend is that you have a clear idea of what you’re jokes are, my biggest mistake was thinking about subjects which I thought were funny and thinking hmm I’ll just talk about
how my grandma can’t use technology, going through situations in your head before the stand up can give you more material to improvise.
Good luck dude, let us know how it goes!