6'5 200 what postion should i play?

I will be going into my junior year. I played freshman and sopre year but i was closer to 400 pounds then. So i was an offensive lineman/d-tackle. I wasn't horrible but i wasn't great on the line. Shoulda been a lot better for my size. I can get quite aggressive. I don't know how fast i am honestly. I feel pretty fast but i haven't taken the 40 yard dash and i am being home schooled until next year so i have nobody to compare my speed with. Not slow anymore but not super fast. I have pretty good knowledge of football. I have good instincts. I can catch okay because i have huge hands too. I am a good tackler and when i have the ball i am really hard to bring down. I will be starting at new school so they wont know that i used to be a huge fat lineman. Just want some suggestions for defense and offense. So i can work on the skill set of that position.