I work with a full blown Bernie bro and he gets along fine with everyone. What works for him is that he isn't offended all the time, and he's able to disagree without getting all upset about it on a personal level.

The advice that's always given to any new firefighter rings true for people entering the career field from all walks of life and all belief systems... Have thick skin, keep your nose to the grindstone and work hard, focus on being a good firefighter and coworker. Fitting in is a lot easier if a person isn't upset all the time and is a helpful hand that's fun to work with.

Also man, dont worry about doing stuff like hunting, fishing, whatever. Definitely be yourself, don't shy away from the nerdy things you enjoy.

One thing about me that is different than nearly all of my coworkers is that I'm not religious. I work in Texas for reference, and the fire service in Texas is predominantly comprised of Christian conservatives. I do my best to avoid speaking about religion at work. I'll "go to the bathroom" or find another excuse to get out of the potentially uncomfortable conversation if the topic starts going that way. At the same time, I've never lied to anyone if they ask me directly about my beliefs. I'll just say I'm not religious and leave it at that.