This is the only bit I have to guess at and am not sure:-
"...either uses her for a camping den or as great play- ground mega slide.."
Narus is a girls school. So I am not sure if his poetic language refers to that, his dreams of a school or his imaginations of the Cub being used as a playground.
Th rest is a variation on what he is normally like offer to take the nurse for a flight in his Cub and even trying to dance with the nurse but falling over with his infected leg. So one step at a time meaning wait until he recovers more before trying to dance
It helps to get into his frame of mind such as when having a hip operation in "rural" France he "escaped" from the ward without permission for an hour or two and went to a very local race meeting in his hospital bed clothes. He got on very well with the hospital staff.
I thought this was not supposed to be shown but the cub and more :-
I WON'T give up, says Captain Calamity: Eccentric aviator, 72, vows to continue perilous journey across Africa despite crash-landing in a warzone, getting robbed and being stricken by malaria | Daily Mail Online