Re: first timer
Get a manual or two and read em.
Expect for the primer to ignite a powder charge to build pressure to dislodge a bullet down a barrel.
Watch out for unusually large kick, split cases, cratered primers, and other pressure signs.
Watch out for a small pop. If there is no powder it can seize your cylinder or worse put a bullet half way down the barrel. No not shoot again after a small pop.