Getting everything off of my chest

This isn't gonna be easy to let off my chest, but it's destroying my future life and screwing over my chances of ever reaching self actualization. I am severely addicted to porn and I've seen it completely change me in real time. I have went from energetic, social and ambitious, to completely stagnant and anxious and depleted of maturity and life goals. I have seen it root itself deeply into my mind and now I have zero healthy expectations of anything. Sex, body standards, socialization, you name it, I have fucked standards now. And I've seen it affect me elsewhere too. I have isolated myself and rarely talk to my family, and rarely talk to friends outside of school. I don't even have a license yet (I'm 18) because I've been too anxious on the road. And it has got to the point that even the slightest sense of their presence just ticks me off. Porn has made me lose sleep and wake up moody and tired, and made me lustful. I even got blackmailed by a catfish and nearly sextorted about $300. I had to change phone numbers and delete social media for a while right after that. It was awful. And the worst part is that I felt like I had no actual output to share my feelings and struggles. I don't know how I'm meant to share it to close people, like my parents, about how I'm a porn addict. Really the only thing that I have going for me are my high grades, which is a miracle that I even have even with the struggles of life. I'm fat, out of shape, skip school often, isolated and socially awkward. My name's brant, and I'm ready to make a change. Thank you for reading and if you have any advice or tips or anything, feel free to share.