Once upon a time, film was all there was.
You got a fixed lens, fixed focus, fixed shutter-speed, fixed aperture, 'toy' camera for christmas when you were about eight; and it either took a 110 or 220 cartridge, or if born in the '80's possibly 35mm cassette, or if 50's a 120 roll!
Your Dad loaded it, and off you went, snapping away, learning from your mistakes.
Processing was by Tru-Print, who sent you a 'free' film back with your envelope of snaps... so you went and wasted that, trying to do better next time, after Dad told you something 'useful', like when indoors, you need to use a flash-cube; or you cant take photo's of stuff less than the length of your arm away from the camera, or, to keep your fingers away from the lens, 'cos you cant see it in the view-finder! Stuff like that.
Tru-Print, worried about your 'exposure'... like I said, the camera probably only had one shutter speed, maybe 1/30th of a second, and one aperture, probably about f-8... f16-Sunny says shutter should equal film speed on a sunny day; so on 100ASA film Tru-Print gave you; you were probably three stops over-exposed... and in-doors with just window-light, you'd probably be about three stops under-exposed; About the only time the thing gave a 'correct' exposure was probably out-doors on atypically over-cast British afternoon; but what the heck; film has 'exposure lattitude', however much your camera over or under-exposes; Tru-Print just over or under expose the negative to compensate making your 'Tru-Print'!
It ent no big deal; children barely able to write, used to do it!
You have a slightly more sophisticated camera to play with, and it has a METER! What Joy! And you can change the aperture and shutter to get a better exposure, and don't have to rely on guess work for focusing, and you can SEE THROUGH THE LENS! Means you ought to be able to tell if you have left the lens cap on or got your finger in the way!
Your off to a head start there, girl!
Now Just grab some film and go shoot stuff!