High school freshmen advice??

J • J-15-queer-non-binary (she,he,they)

I'm going to be a freshmen in a couple months and I'm freaking out because I'm been homeschooled all threw middle school I'm a 8th grader and I'm afraid because I'm antisocial and have anxiety which causes me to freak out but on the other hand I'm going to be with my sister and my closest friend the other thing I'm worried about is my grades I'm also don't know how to be myself and I'm really quiet please someone reassure me with advice😞