How do blogs work?

So I decided to start a blog just because but I'm not sure exactly waht to do now that I have it... I don't know what the first entry should be and who would actually read it and you know just that stuff but if anyone would like to give me any advice on it, it's more than welcomed! I'll add the link to my blog as well, which I literally JUST made so there's not even a profile picture or...anything at all!

http://www.blogger.com/home

P.s. Does anyone notice the little face in the link? Haha
P.p.s. Just adding this because of the word minimum...