The instructions on how to request to join a group are not clear. They do not include how to request to join. Please add those to the KA. After finding the group you wish to join to the right of the group name click on options then request to join.
There is already such a "Knowledge Article" in 'FamilySearch'.
How do I join an indexing group?
I hope this helps.
Is that article clearer, acceptable?
If, not, then, please advise.