From one woman to another, and as someone who has worked with mostly men for many years, yes, you do have to prove yourself or they will never respect you. They will think you got where you are because of who you know. If your body hurts, take Aleve/Advil. Don’t be THAT woman the guys think will run to HR after the first off-color joke. Yes, you do need to establish boundaries but I’ve found things go over a lot easier with humor. It’s great working around guys. I prefer it much more than working with women. Guys are more fun.