Hey Em, welcome to YWS!
The 2:1 ratio is actually now the 3:1 ratio! Although it isn't totally hardcoded into the site, it is recommended that you stick to this. Basically it means that once you've done 3 reviews (they need to be over 250 characters or 3 lines) then you can post some of your story. Generally it's best to post your story one chapter at a time because it's hard for people to review entire novels / long pieces of work.
Hope this helps, and if you have any more questions then PM me!
~Amy
