C.K.
I use blogspot.com It is free and very easy to use. I just picked a template that I liked, then the colors, and that was it. Entering a blog post is simple, and kinda fool proof with the easy to understand instructions they give. They walk you through the whole set-up process so you don't need to know anything about how websites work and all of that.
Many people use their blog as a journal. You can make your posts private, so that only you and people you invite can read it. Or you can make it public and then everyone can read it.
You can choose whether you want to accept comments or not. You can also set it up so that you have to read every comment and approve it before it is posted for everyone else to see. That way you have some control over comments being left by others.
People can join your blog by becoming a follower. That means that when you make a new post those people automatically get a notice in their email or whatever saying you posted.
If you want friends and family to read your blog, just give them the address and they can read it. If you want other people to read your blog a good way to get people to your site is to leave comments on other blogs, and include your blog site. Most people will go look at a blog that has left a comment on their blog. It's like returning the favor sort of thing.
Blogging is really easy, so just jump in and do it. Personally I don't worry about people reading it or not. I think I have 2 people who read mine (that aren't friends or family). The blog is more for me, an outlet for thoughts, than anything else.