I know you’re looking for more practical advice and it looks like you got some from other comments, but here’s a little tip I’ve picked up over the years. Don’t overthink it, just be yourself. I’ve been in a bunch of relationships despite having a moderate/severe stutter. More than one of my past gfs told me they found my stutter cute. You’re stutter doesn’t define you, it’s a part of you and if she doesn’t see it that way, her loss. You got this, have a great time and don’t worry about trying to be someone you’re not. Good luck!