We've got a public one with blogger.com and not had any issues in 2+ years. You can set up the page how you like it, so if you didn't want any comments you can leave them off the site. Even if you did allow comments, you can still nuke anything via your email account before it goes live if you set it up that way.
In reality, your spot on the Internet is a grain of sand in a desert! Pretty much the only people interested in your site will be...those that are interested in your site
Just get on there, and write what you're comfortable with. There is no need to give away where you live, even create a new email address that is only associated with your site if you're more comfortable with that. And only give the site address to those that you want, but it's kind of cool to see that someone from Outer Mongolia has read your blog, and 3 from Turkmenistan!