It's the same thing. If I were writing a blog about Websphere, the posts would be about things which I wanted to post about. I wouldn't want people posting their questions there unless they were about the thing which I had been posting about.
And it sounded like you wanted to hijack the blog to ask about things which you had questions about. So no, I would recommend that if you have questions arising from your study, you should ask them on Internet forums. Like this one, for example. That's what it's for.
Destroy anything that stands in your way. Except this tiny ad: