Need some encouragement in a world full of men

So I just changed jobs. A position in which im so excited about. Going in, I didnt know what to expect. Its a job of mostly Cops but I will be assigned to work with them. Im the only woman there so when it was time for me to introduce myself, i choked, i got so nervous but I managed to give it my all, say something small and apparently I was told I kept looking down. I feel like a failure. Today someone reminded me that my other colleague spoke more unlike me who became shy. I hated that comment but I mean I did get nervous. I just feel like I betrayed my inner bad boss bitch and instead let men intimidate me. I am beating myself up for it. How do you cope? i just need words of encouragement. I feel so cringy now. Like thats how I am being viewed now .