Midwife vs DR help

Hi ladies!
I went to fill out paper work and set up my first prenatal appointment and was assigned a midwife because I'm not considered high risk. I am from Texas and am currently living in Washington state. I have never know anyone that used a midwife, so I'm curious about it. They also informed me that I will only receive 1 US and it will be at 20 weeks with my DR in Texas I had one at 8 weeks and one at 20. I'm apprehensive any experience or tips would be greatly appreciated. 6 weeks today!