How do I start conversation with anybody?

This is a very light r/Advice post but my gf of 2 months and I had been distancing and we talked and I realized I never really started any conversation other than "Good morning" "Good night" "How are you" and that's really it. I do not want advice on that, that has been cleared up and is doing great now. However, I realized I have no clue how to start conversation with anybody, Im awkward with socializing and want to be more social able.