The puzzle is new to me. I have only been playing for a couple of months, and find myself in a situation where there are only 10 points available for the 2 beginner puzzles that I am eligible to play.
Since you now have more than 150 global points, you are no longer eligible to start any of the (<15) or (<150) puzzles.
This puzzle, however, is open to all players regardless of global points score--so grats for ranking as highly as you have.
In order to play more puzzles (Evolvers) you need to join a Group. Take your time, look over the Group pages and see if there are any you would like to join. Use the messages link from your foldit page to communicate with the ones that interest you and ask questions. Good luck!