I see you've been redirected to the right place already, I'll lock this thread for you now If you want to introduce yourself in general (instead of asking for critique specifically), please feel free to post in the Welcome Center forum!
There's a literary critique sticky at the top of the forum. The best way to get criticism for a piece -- if, like you and I, are not a premium member -- is to post a link in that thread. Most pieces get at least one critique fairly quickly, and sometimes several.
You're welcome! It's a great bunch of dedicated folks, so if you're a little patient (they may be busy, but they get to most stuff in a few days, tops) they can collectively provide great perspective. Good luck!
You're welcome. Here's hoping it leads you great places. Don't get discouraged if it takes a while. Writing is slow art. True appreciation may take months if you're lucky, years if you aren't. Keep writing new things, and keep plugging your old work until it sells. In time, it probably will.