I do the pumping thing and light it, it seems pretty straightforward.steak in the garage! lol, im going to fully service it and see how i go, but in my head lighting a gas stove has to be easier!
I have dabbled collecting Coleman stuff (mainly lanterns) for a couple years now. Generally if it doesn't work it is old fuel that has dried and is plugging something up or something about a bug blocking airflow. If they build and hold pressure an actual hard part is kinda rare to need replaced. There is a ton of info about how to work on them out there.
But I love tinkering with stuff like this, I use a 1961 200A lantern to monitor how stuff is cooking on my charcoal grille...