Hello and welcome to LessWrong!
Sounds like you're quite exposed to a variety of fields. Very admirable! It never hurts to have a wide background, and that exposure to all those different hobbies and areas can improve your work in your central field of interest.
No need for some great story to join. Having an interest in learning is good enough! If you want to read some LW material to give you an idea of the type of writings you'll see and the type of topics we discuss, feel free to read the Sequences, which collect a large number of LW posts from over the years. It's something of a crash course on a variety of topics and issues. Quite heavy reading, but very useful.
If you want to join the conversation, check out the Discussion board. This is where the day-to-day conversations on LW take place. It's a good place to get a feel for the conversation standards of the community before you start contributing your own ideas. Also, definitely check out the latest Open Thread. It's a bit more laid back than the Discussion board as a whole, but still a good place to talk, ask questions, and engage fellow LWers.
Also, I don't know where you live in Florida, but if meeting up and chatting with fellow LWers in physical space interests you, Florida has two LW meetups: one in Fort Lauderdale, one in Coral Gables. LW meetups are great places to get acquainted with your fellow rationalists, discuss different topics, and just to have fun.
Glad to have you with us! Look forward to seeing you around the forums soon.
A few notes about the site mechanics
A few notes about the community
If English is not your first language, don't let that make you afraid to post or comment. You can get English help on Discussion- or Main-level posts by sending a PM to one of the following users (use the "send message" link on the upper right of their user page). Either put the text of the post in the PM, or just say that you'd like English help and you'll get a response with an email address.
* Normal_Anomaly
* Randaly
* shokwave
* Barry Cotter
A note for theists: you will find the Less Wrong community to be predominantly atheist, though not completely so, and most of us are genuinely respectful of religious people who keep the usual community norms. It's worth saying that we might think religion is off-topic in some places where you think it's on-topic, so be thoughtful about where and how you start explicitly talking about it; some of us are happy to talk about religion, some of us aren't interested. Bear in mind that many of us really, truly have given full consideration to theistic claims and found them to be false, so starting with the most common arguments is pretty likely just to annoy people. Anyhow, it's absolutely OK to mention that you're religious in your welcome post and to invite a discussion there.
A list of some posts that are pretty awesome
I recommend the major sequences to everybody, but I realize how daunting they look at first. So for purposes of immediate gratification, the following posts are particularly interesting/illuminating/provocative and don't require any previous reading:
More suggestions are welcome! Or just check out the top-rated posts from the history of Less Wrong. Most posts at +50 or more are well worth your time.
Welcome to Less Wrong, and we look forward to hearing from you throughout the site!
Once a post gets over 500 comments, the site stops showing them all by default. If this post has 500 comments and you have 20 karma, please do start the next welcome post; a new post is a good perennial way to encourage newcomers and lurkers to introduce themselves. (Step-by-step, foolproof instructions here; takes <180seconds.)
If there's anything I should add or update on this post (especially broken links), please send me a private message—I may not notice a comment on the post.
Finally, a big thank you to everyone that helped write this post via its predecessors!