Moving out first time

My bf and I will be moving out tg for the first time. We are 29 and 28, and have been together for almost five years. I have never lived apart from my parents. I still live in my childhood home and never lived anywhere else. I am TERRIFIED. granted, we r only moving 15 mins away from my parents lol…. I am so so scared. I’m so scared of how it will change my bf and I’s relationship. I’m so scared of not doing well on my own and being too immature enough to take care of myself. I am so scared. Anyone have advice or kind words?