Yeah, swimming is part of boot camp, but spacewalk would be equivalent of diving. I don't know if diving is part of boot camp, but I also find it weird that as engineer working on space ship he didn't get any spacewalk training. Then again, he does said he's ground engineer and part of infantry so maybe that is why he didn't get any training.True, although I did find that a bit strange. Just as in the US Navy and US Marine Corps you go have swimming as part of your boot camp, I would have assumed the same from this Navy. I.e. I would assume that they actually trained for spacewalks (or at least something as basic as using magnetic boots in microgravity) as part of their basic training / boot camp.
Since I don't have the entire lore of the H5 universe at hand I can't say whether that is the case or not. Even if it weren't the case, he had Annie to walk him through it, and generally speaking, when you give a grunt a pair of sticky boots and tell him "walk on the outside of the ship to save the pretty girls (and yourself) from burning up," that grunt will figure it out. Especially if there's a chance of some kind of hero's reward waiting at the end.
You're right about him figuring it out in this situation... especially with potential for some kind of reward from girls afterwards.