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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.
The way I see it is that as long as you learn from doing so, then that's all that really matters. I've done it myself once but made sure I fully understood it, made notes and reflected on it before I moved on.