Great advice here, and reminds me of the days I used to shoot weddings (80s/90s- part time as I went to college and a bit beyond). I prefer to shoot for enjoyment today. Shooting weddings is actually pretty critical and it is work. As for liability mentioned here, Professional Photographers of America used to have insurance for wedding shoots for their members. I do not know if they still do. I never had insurance, and never needed it, but I took some risk.
There are certain shots you HAVE to have, and others (lots of candids, dancing, etc.) are less critical, but still nice. Be sure to know what is required (e.g., bride + groom, ring shot, cutting cake, bride + her father, full bride's family, etc.).
If there is a religious ceremony, be sure to ask the priest/pastor/rabbi/etc. if it is ok to shoot during the ceremony, and if flash is allowed. Have a silent camera. I would not want to use anything but a leaf shutter for weddings (silent plus flash sync).
I used a Mamiya C330f + C220f; brought a couple of 5-packs of VPS 220 (minimum, usually did not use all of it); Two Metz CT60 flash guns with charged dryfit batteries (never came close to depleting, but you cannot get these anymore). Changing film was a bit of a pain, but with 220, and two cameras was pretty manageable. Usually I had the 80mm on one camera and the 55mm on the other for groups. Ring shots were a snap with the C330f and bellows (just had to pay attention to the parallax indicator and bellows factor indicator). My dad shot weddings for a few years before me and I worked with him a few times as I started.
If I wanted to make money at weddings today, to be honest, I would probably go digital (I know you say you are not in this for the money). But I do like the idea of going film. I just suspect there will not be a lot of people caring too much these days, and they will still want great results.
When I shot weddings the film was available and reasonable (and 220). Porta today is probably a little better. Pro Labs were fast and reasonable and produced really good 6x6 proofs fast (I used Visual Productions in San Diego), and optimized around VPS/skin tones, plus had good kits for cropping enlargements, etc. The Metz CT60 flashes really worked well (and still do, but without those great dryfit batteries). I often set the aperture/flash to f8, then varied the shutter speed depending on the background lighting (and avoiding ghost images).