You will be given 3 options during the registration process under "event questions" (highlighted below):

1. To Join an existing team - means you know which team you would like to join AND they are expecting you as part of their roster.

2. To create a new team - means you are willing to captain a team (mostly just point of contact responsibilities for rule interpretations)

3. To not join a team - this is synonymous with "enter the draft".