Some sparse thought, I understand I am possibly suggesting things that you have already made, or thought, or considered.
If you are unemployed and with plenty of free time, I would propose myself as assistant to a photographer pretty much away, but not too much away, from my area. He would be confident that, once your apprenticeship is over, you are not going to cover his area, but you will be able to act as a referral for each other, and as a backup for each other in case of illness, accident, "double booking" etc.
I would never do a marriage as main photographer with only two marriages on my shoulder "as a friend". When you do things for free, and for a friend, they are bound to be good. It's not that your friends want to flatter you, it is really that expectations are totally different. I am no wedding photographer, but I suspect the mother of the bride, the bride etc. will have a totally different attitude toward you, your pictures, your time, your availability etc. than your friends.
Rather than "wedding" photographer I would sell myself as "ceremony" photographer. How many people are going to marry in your neighbourhood of 3000 households in the next few months? On the other hand, somebody might look for a photographer for a birthday, a first communion, a confirmation, a baptism, a graduation, the opening of a shop, the presentation of a book, etc.
Besides, a graduation or a birthday are less stressing than a marriage.
I would have 3 cameras: one for colour, one for B&W, and one as a backup. If a camera fails, the backup one can replace the B&W or the colour one and your work goes on undisturbed. The third one is to be left in your car etc. provided it is not too far away. You also need a backup flash, and backup of anything that you may need (backup glasses if you are a glass wearer, for instance).
Most of all, you need a backup photographer. What if you are ill the day of the marriage?
I did not attend many marriages, but I never saw a marriage with a photographer without an assistant. OK the last marriage I saw was in december 2003. Old same Hasselblad 500c, two Metz torches, photographer & assistant.
You should also prepare a contract where you lay down clearly what the clients will have, and what they will not have. Contracts change enormously, some photographers give copyright, some retain it, some photographers give the negatives, some retain them, you have to specify how many large format images are you going to print, how much is for each extra print. Your clients might have totally different expectations and would give for granted the opposite of what you give for granted. As far as I remember having read, photographer account to print sales to relatives and friends for around one half of the revenue.
An insurance for professional damages would not be a bad idea at all. People can get very angry if you screw their wedding photographic service. Your contract should also try to foresee problems. This business can be risky.
Also I would begin following fora by wedding photographers (not that I knew any, but I suppose there are a few around).
If you have spare time, I would just go around assisting to wedding ceremonies, to see what the photographer does at every moment of the ceremony. Study the mass carefully, see when the photographer can use a flash, when cannot, when he's not supposed to take any picture at all. Study also the way the photographer deal with the couple, when on the parents, the friends etc. "Steal the skill with your eyes".
Make friend with your local priest. Ask him what a wedding photographer must do, what he must not do. Wedding photographers often have to have a nulla osta from the priest in my country, priests don't like having photographers who are invasive, disturb the sacred character of the ceremony, attract attention, divert attention, flash around as if they were to a party. Make your your priest knows you understand his needs.
Well, good luck. You believe in marriage, so you definitely must be an optimist
PS If there are people of other religion in your area, study their marriages, their equivalent of baptism, first communion etc. Make yourself known to the local rabbi/pastor/imam/etc. Let them your telephone number, some couple might ask their priest if he knows a wedding photographer.
Have more than one formal dress, of course, unless everybody is informally dressed. Perspirate professionalism...