Well, I have a blog on Blogspot, and it's fairly easy to use. I'm sure if you're even tech savvy in the least, you'd be able to manage getting the layout done and everything. If you prefer tumblr, you could use that as well. Both are fairly good from my experience, though I prefer Blogspot. To get the word out, you best put it in the sig. of all forums you're on, and join a couple cooking forums as well. Even if you post stuff like, "Ooh, that sounds nice!", your blog would get publicity simply since the link is there. However, it is obviously better if you post something intelligible, interesting, memorable, or even funny. That way the reader would know that they'd be getting more of that when you click the link to the blog.
Getting one up and running can be done in under an hour, and doesn't take a lot of effort. All I can say is, in most blog websites, people can leave anonymous comments. Don't pay attention to, or feel bad about the negative ones. Don't let them get to you, because those people are 100% trolls. If it gets you down, just start being awesome instead.

So yeah that's all I know. Hope it helps.