I have been into photography for 20 years. I just started weddings. Your age could possibly be a turn away for some, but don't let it stop you.
Confidence is the single most important element for any job, whether it is wedding photography, or a managment position at McDonalds. You seem to have it. There are many who have to work hard to be wedding photographers, for some it comes naturally and is a joy. Watch out for those who will tell you it's hard work. It is for them, but may not be for you.
For me... I had been told that it was hard work... it doesn't seem to be for me. My past jobs (that are not remotely photography related) have helped me to deal with people, a very important element. If you have the eye and the ability, experience is the only thing that will help. I say go for it.
I advertised on craigslist.com for cost and already did one wedding from craigslist, and have 4 booked within the next month and a half. This is a great way to build a portfolio. Just be up front and honest with clients. I have only done 5 (non-relative) weddings to date, and had a blast doing them. But they all went as expected: A few issues, but handled them beautifully. The best experience you will ever get.
I don't believe that there is a "right way" to persue wedding photography. Ten out of ten people will persue it very differently. We all have different styles, and different people skills. In the end, people skills will be the one element that will put food on the table.
Your going to work your butt off whether your shooting weddings, or working in an office. Try something you love regardless of your age. I say give craigslist a shot before even considering a mentor, or further education. See if it is not "hard work" for you first, and if it is indeed something that you want to invest your time into and persue. Then persue it how you see fit to mold your style.
JMHO


