As a hobby? Just start taking pictures = photography IMO. I never really even considered myself as a photographer. People who consider themselves as a photographer seem to be doing it for "art", which is subjective. They seem to be looking for a perfect picture that just looks like "wow" when you look at it, or when shown to somebody. I just take pictures "hit or miss" as if it's a "crime scene", a whole bunch of shots to increase a likelihood of "hit", from different angles, settings, etc. LOL.
If you're doing Polaroid or film, that's probably not a good starting point since you're very constrained to taking a limited number of shots. I think that'll put you under the mentality of "every single shot must count and be perfect", very unforgiving and stressful. Maybe do this later once you've gotten good being able to make all the mistakes you'd like with digital.
As for taking pictures, all camera settings tutorials can be found on YouTube with tons of people explaining it. ie. Aperture, F-Stop, exposure, etc.
The only advice I can give is look up "Rules of Thirds", it's how to frame your pictures pleasingly when taking it. Apparently I did this naturally and didn't even know it until somebody looking at one of my pics mentioned the technique.
Digital also allows for "cheating", photoshop and lightroom to "touch up pictures". You can remove entire objects and people with ease, change colors of things convincingly....all sorts of cheats. Again, lots of tutorials on YouTube.
I did B&W film developing & prints in high school, it's a pain in the ass. It's sort of retro hipster stuff today, hence Max Caulfield.