Could i play Fullback?

just turned 13,and am moving up to the next division in my leauge.I weigh 134 lbs,run a 6 flat in the 40 and i am 5'7.In physical fitness on a fat percentage test i only got 18 percent so dont say O-line.I can catch the ball,run,take a hit,I have expierence from d-line so i can rip through the O-line well.I have expierence from Tightend so i can block well.But my tackling needs work and i have a habbit with arm tackles.its my second year of football and last season i played Inside linebacker and they pretty much used me to blitz every play and i also played Tightend and blocking is one of my best elements.If im running the ball im not the type to try n juke them out ill either run them over,give them a stiff arm or brace for a hit.And yes i do work out on Mon,wed,thurs i do upper body,and on tues and friday i do lower,saturday and sunday are breaks.My stronges muscles have to be either shoulder or thighs.And notice before you type your answer i will grow,get faster,and stronger before next season starts