Aviation ornanceman help?

So I am joining the Navy and I really like the Aviation Ordnanceman job, and my recruitor is sending me down to MEPS Thursday to sign that job. It isn't my first choice, but I do like it. My question is, I don't know if I'm right for the job. I'm 5,1 and 110lbs. The internet can only be so much help, and I don't know what it really takes. I know it's a lot of physical stress. I just want to know from a person, but it takes to be an AO?