I would also recommend getting a mentor. S/he can help you not only with your reviews, but answer any questions you may have about the site. The link above about the mentor program should answer any questions you have on that program.
If you want to sign up, you find that on your Account Dashboard (top right corner). There's a list of links, one of which says "Mentor Program."
Then click "Mentor List." A list of everyone available will show up. Go through the profiles and pick someone you like. There's a button to the right that says "Request" when you're ready to do so.
I'd go that route if you're super confused. You get one on one help PLUS your reviews will have a one up of having someone else look them over first!
Welcome and good luck!