When should I invite my members to join my study?

You should invite your members as soon as you feel ready. 

Some may want to have the whole study created before inviting members to join, while others would prefer to make it as they go. It all depends on your preference and what kind of study you are going through.

For a sermon based study, you will obviously need to wait till you have new sermon content every week.

For a curriculum based study, you may want to have most of it finished before inviting members to join you. This way you can assign your members to read ahead and have more time in the group setting for discussion.