First Prenatal Vidit

My first prenatal appointment was yesterday. I'm only 6 weeks along so the ultrasound was kind of "blank" lol. However, I still feel blessed to have life growing inside of me. My next appointment will be in 2 weeks at 8 weeks then I will start going every 4 weeks. I am so excited. My OB says maybe we can get a better ultrasound view at the next appointment. This is my first pregnancy so I don't know what to expect at my prenatal visits. What should I expect? What kind of tests/exams should I expect? Any questions I should be asking?