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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
Not the best place to start. This cata is not easy. As for me - I always try to figure out myself. As for the tests - that's the point. Passing 1 test is easy. Passing all is hard and teaches you to think ahead solving every possible condition.
Easy way to get help on solving a kata is to join this on gitter and ask what every questions you have.