There's no dumb questions on Pinside. As an absolute minimum you must remove the balls. Loose steel balls crashing around inside can easily smash vital plastics. Also, if it has a coin tray, take that out as well as any other loose items someone may have stored behind the main door. You can then open the backbox door which will usually need a key. This may well have two bolts that stop the top box from folding down to rest against the bottom playfield cabinet. Remove these and gently lower the back box down onto the cabinet and use a blanket or something else soft between them so you don't dent the side rails. Remove the legs. Tip it back so it is resting on its broad end and then if you have a sack barrow, use this with a piece of cardboard on to move it about.
Best of luck and enjoy your new hobby.