Graduating high school, unsure what to do
I'm 18F and I am graduating high school in a couple weeks. I'm incredibly behind in school work, but school is not something I am passionate about. I don't want to go to university, I want to get my own place, start working, and figure it out from there. I told my dad my wishes, but he says that it'll be a total disaster for the family if I decide to take a gap year. Its just weird because he says he wants the best for me but gets so bent out of shape and really emphasizes how me taking a gap year is going to cause a "tsunami" for the family and wipe everything out ??? I asked him to specify and he quite literally said "I don't know specifics but I know it's going to be really bad."
It's not like we are financially struggling and they're relying on me to become successful to support the family. In fact my dad is incredibly rich, like I don't have to work for the rest of my life if I don't want to. I have always been able to participate in club sports, go traveling, ask for anything, live in big houses. I also have a huge amount of inheritance money from my mother's side of the family, I won't specify, but it's a huge amount.
I feel so trapped because I am young and I know I have no idea what the actual world is like. There are so many things I have to learn but theres no one I can comfortably lean on. My family has always been toxic and psychologically and sometimes physically abusive. I was diagnosed with cptsd a while back. All I want is to get out of here. I don't want to deal with the pressure of my family members, I don't want to walk around egg shells and do what they want me to do so that they don't explode at me or threaten me. I don't want to be scared of coming home from school. I don't want to go to university and do terribly causing my parents to get upset at me and punish me. I don't want to be financially dependent on my family either, because they are incredibly transactional and conditional with their love, if we have a conflict, they take away my belongings and quite literally bully me, they'll humiliate me, glare at me, threaten me, they'll take away my devices and my ability to leave the house to prevent any form of communication, they'll say horrible things to me.
At the same time, I feel like I'm unreasonable to feel this way. I think theres a part of me that is weak willed and sensitive to small things. Maybe going to university and functioning like a normal human being shouldn't be this exhausting for me. I was diagnosed with severe depression, a generalized anxiety disorder, inattentive adhd, and possible bpd, so I feel like that could be why. I feel like I should have my future planned out. Like I should have a passion, good grades, that I should be more mature and move on from the past because it's obviously not helping me. Maybe I am just lazy and maybe I am spoiled rotten, maybe I don't recognize the amount of support I have had in my life. I can't tell what it is. I feel like theres so much going on in my head and theres so many things I have to unpack before making my life busy again with university in a couple months. I want to live alone and just feel at peace for once. Be away from my family and heal. Just focus on myself without there being something I have to worry about, or an expectation I have to reach. I'd be okay with working a full time job, as long as my home life is okay because thats all I have ever wished for.
I'd love any advice on how to move forward and how to become more independent because I'm really lost and stressed. I want to have control over my life, I want to go out and just live without being stressed out because of family. Please be brutally honest with me as well and don't be afraid to clock my shit.