Agar is very raw, but has enormous potential. What he needs most is to play plenty of cricket on a continuous basis. Hopefully he'll play the entire upcoming Shield season, get some good performances on the board and hone his skills.
I hope the boy goes really well, but he has problems.
A left arm orthodox, that doesn't have any variation and doesn't really rip the ball.
As a batsman, his technique means, he can't control the ball hitting on the leg side off the backfoot. he will get filled in on a regular basis.
I'm not saying he can't succeed, rather that he'll need a lot of work.