You can practice with friends (of any gender) if you can open up to them about your concerns. You might be able to come up with a physical trigger to stop the laughter like pressing on your jaw. In any case you are very courageous to put yourself out there and I have faith you can do it.
When you set aside your fears & anxieties, talking to guys is just like talking to women. You find some common ground through trial and error, and overlook the awkwardness that’s inevitable when you’re getting to know someone. Oh, and tell your inner voices saying critical or discouraging things that you appreciate their help but don’t need them right now.
It sounds very challenging!