Am I making the right choice?

So my boyfriend and I just started dating. We have been together for a month. I love him a lot and I really feel like we will be together forever. I know that’s what most people say but I do believe this because with my past boyfriends I never really believed that but things with him feels so much different and right. Anyways in September I turn 18 and the plan is that I’m moving in with him, his sister, and his sisters boyfriend. I’m so ready to get out of my house because I don’t like my mom. But I’m scared. I’m scared because I have no plans for life. I’m scared I’m getting too far ahead of myself. I rely on other people for myself so I’m just scared that I won’t know how to do things. I don’t know how adulting works. I just don’t know how to do anything so I’m nervous. Idk. I honestly dont really know exactly what I’m asking or saying I just had to get that off my mind.