kdx

I'm 5'9" 5'10" and weigh around 140. I haven't rode many dirtbikes but have drove a few ATV's. I would like to get a dirtbike but don't know exactly what I should be looking for. 150's seem small and I don't want to go buy another one soon because I grew out of it right after i were to just buy...

im 13 years old im 5 foot ive never riden a bike with a clutch and my dad has both of these bikes and he wants me to have one i need help