No worries :) Yeah having to blow your way out of the starting room would be a cool teaching mechanic, but as it is it's already a good learning arena. Shooting the buttons to change the player name is pretty satisfying and a good way to test out the weapons.
As for the door button, my only suggestion might be to move it so that it's not right next to the door. I found I was kinda grazing it by mistake while flying in and out of the doors, but that might be a good teaching mechanic too lol.