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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 a native speaker (as you probably are), but even so (or more so) I found the original description pretty clear and your suggestions seem to reword a part of it I got already.
Was there any part with wrong grammar or syntax?