I shot weddings professionally, for 35 years and equipment and photographic knowledge is about 5% and 95% is logistics. (getting people to where you want them, when you want them)
You should be able to load/unload and use your film camera with your eyes closed.
You need to be technically proficient with all your equipment.
You need to appear and act in a professional manner.
You need to know the running order of the wedding day, be it civil/religious service.
You need to work with the couple/people to get the right people in the right place for the right shot
It can all be done very easily, avoiding Bridezilla (basically a bully in a white dress) BUT you need experience.
My suggestion would be to assist/second shooter with a professional.
Take your time and learn the ins and outs of how the whole wedding day scenario works and then when you know it like the back of your hand, then give it a go.
Just my opinion.