Welcome to PB...... you should have maybe used the introductions section, but regardless, you're here
I hope you enjoy it here, it's a great site, with friendly people, and of course we all love photography!
A few things to keep in mind... if you want people to visit and comment on your work, then visit and comment on theirs too... they'll often reciprocate in kind.
If you want critiques on a specific photo, then this is the thread to post in. If you are open to critiques on your blog, then mention in your profile, or on your posts. Critiques are often hard to come by here, since most people are so friendly, they often err on the side of not wanting to offend anyone.
Speaking about your profile, you mentioned your age,.... I would just say, if you don't want people to say you're young, then don't tell them you are
) No one would be the wiser if you left your age out of it.
Your blog is wonderful, you have a good eye IMHO. Keep shooting and posting!