What would be a good dirt bike for me im 14 and about 5'11 and weigh around 150. I never owned a bike but i have some expierence on them?

Maybe go for a crf or ttr 230 by Yamaha or Honda if you want a normal and still fast but easy ride. I would get a 250 2 stroke (but that's just because I've been riding for all of my life, no joke). 2 Strokes are WAY faster, and will throw you off dangerously at 150, but 4 strokes are way better for beginners. Don't go with any brand besides a KTM, Suzuki, Kawasaki, Honda, or Yamaha.