Congratulations, it’s a big step and often not a very comfortable one your first few times. Also, this is not meant to put a damper on anything, but just understand that you’ll be coming out your entire life, (especially) any time you’re in a relationship with someone of the same sex.
Friend group in college? You’ll be coming out either overtly (“I’m bi!”) or implicitly.
Introducing people at work to your partner. At first when you do it you’ll be watching for reactions, gauging any changes in body language. It’s just the reality.
And it’s why normalizing different orientations and presentations of the many facets of being LGBTQ+ is so important in society. So that coming out doesn’t have to be a real thing anymore. You’ve done something important and beyond yourself. The more people realize that LGBTQ+ people are everywhere—the more seen we are—the more it becomes normalized and helps shifts the current default.