Aww I think you might be over thinking it haha :) there are no right or wrong answers, I promise. Just be transparent with each other about how this will play out. For example: are you calling each other boyfriend and girlfriend? Texting everyday? Do you go on dates but no sex? Only sex, no dates? Sex, but no sleepovers? Are you allowed to go on dates with other people? Are you allowed to sleep with other people? If you are seeing other people, do you tell each other about it or is that not your business? Again there's no right or wrong way to go abour it!
Also remember that relationships and feelings are organic and susceptible to change. So keep an open line of communication and regularly check in with yourself and each other and tweak and modify your terms as needed
Does that help?