SOS never been to the gyno !

I’m 19, have had a few partners so far, and have a serious boyfriend now. I’ve never been to a gyno because I live with my single dad so I’m not sure that he even knows I have to go (or that he wants to talk about it...) lol so I’m going to make an appointment soon but I’m scared, what should I expect? Should I have questions? Can I get tested for stds or anything then? I don’t think I have anything but I want to be tested to be sure. Sos