Hahahah actually one of his best friends who helped form the team was 13 and had been doing the hero gig fo longer than that, and Kaldur was twelve when he joined the Atlantean military so..... he has less qualms with that than one might expect.

On the other hand, it is someone who doesn't know who the avatar is, but trusts that if Aang says he can do something, he can do it.

Which might be refreshing, since that is a faith in Aang, and less in the Avatar. He'd ask if Aang has experience, and if Aang does, he will accept that, and assume that Aang is prepared and ready to be directed.