My kids are 4 and 2 and I feel as if I've been homeschooling since birth! Personally I'm very glad I took the time to research differing educational methods when my dds were so young, because now not only am I confident in our decisions, but just let doubting family members try to find a foothold to argue with me
I'm also spared confusion or doubt when I hear about something "new" - a few minutes of reading, and I can figure out where the new information fits (or, more likely doesn't fit) in our "scheme"
I joined a local support group when my older dd was 3 b/c she was jealous that all of her friends "got" to go to preschool. I was surprised to find that I was not the only mom with kids WAY younger than school age. My kids have already developed a great peer group, and there are plenty of open-ended activities that we participate in.
So far as method, right now I see us as unschoolers who borrow heavily from a waldorf philosophy. But, I realize that in order to best meet my families needs, I have to watch my kids and see what is in their best interests. my dd went through a worksheet phase recently, and a year ago she begged me to teach her to read. I meet both of these requests because I don't want her to form any permenant ideas about her education just yet. Besides, different things work at different times in all areas of life.
The best way to learn about different h/s philosophies is to read, read, read. Don't purchase a lot of books at first, b/c you will wind up with a shelf full of things that don't fit your family. Visit the library and see what is in their collection - search the internet and look up recommended books from other sites. There are some "general" books out there that give an overview of different philosophies to give you a starting point. I dont have a url handy (new computer) but one good site to start with is "jon's homeschooling page". It's really big, so a search should turn it up. I am sorry, though, that I can't think of a h/s montassori resource just now - I know it does exist. There is a book called "montassori at home" but if I remember correctly, it was mostly ideas for making the articles used in the classrooms. (which could be fun too.)
Good luck - you have lots of reading ahead of you, but it's FUN!