I've been thinking about writing a blog for a long time and every so often I try to work out the best platform to go with. One of my pen-pals has written that I should do this to have my ink reviews saved all together.
However, I get scared that I will choose the wrong one so I always withhold my money.

I'm really tempted to go with WordPress because it looks very good on other blogs that I frequently read, but my current confusion lies between WordPress.org and WordPress.com.

Who has what, how easy is it to get up and running, and how expensive is it?