I like the rhyme scheme you've chosen. It's what I started out with when I first started out, and the good thing about it is that it allows you some space to fit what you want to say without the pressure of rhyming every line.
Not that there should be any pressure, although poetry is an immediate thing, it can also be a deliberate thing, where there is no time limit on how long it takes.
I think you did ok with the rhythm, and that is good to see. The more you practice the better that will become, and everyone is born with a different ear for words, but it's something that can be developed also.
The best parts i like about the poem are the idea of grabbing something wartorn out of no-man's-land
the sort of looking glass effect the dew drops gave,
and I very much liked the selflessness of taking hits for planet population so that they wouldn't have to feel themselves, a conduit for pain.
I'd write out the dew drops, and Padora's secrets, limit the use of 'burden', 'world's' anything and be very careful about the veins deal.
I guess I'm ssaying that there's an awful lot that is going on here and the poem might be stronger if you fined down the imagery somewhat.