reservists

Hi, So I've applied for the role of NCM reservist SigOp, I was considering the other more 'IT' trades, however the bulk of em are all closed. I asked several others and there's not much of a explanation, especially during some info sessions on the weight you carry. I've heard anywhere from...

Dear folks, I'm 45 now, wondering if it is too old to join the air force/navy/army? would that be higher chance to apply for reservist instead fo full time? I'm most interested in the air force, do you think it is hardly being able to get recruit at this age even being a reservist? thx!