The conversion rate for the points hasn't changed yet, but can
change in the future.
As for tips, you could look into the mentor program
. A mentor can help you write reviews, or you can just chat back and forth with one about things on the site and they can help answer any questions you might have.
You should most definitely check out Kindred's Tips I wish I knew about EF sooner
. A whole bunch of us have added to that thread since it's been started, and it's a good place to ask questions too.
JR has also done a bunch of workshops on the review program
. They have a whole lot of information about the review program in general, and are another good place to ask questions.
Otherwise, I suggest that you hang out, have fun, and don't be afraid to ask something if you're not sure, but if you're going to ask on the forums, search really well to make sure you aren't starting a duplicate thread.