@TeamYouTube
You people are damn near impossible to get help from...
I need help with my family plan. I cannot even add my own account to it.
I had a plan with my main acc but wanted my side acc to be the manager so I deleted my old plan. Now I cannot join the new one.
Just to confirm, are you getting any error message while adding your account to the family plan? Also, please check our Help Center article 'Learn about YouTube family plans' which may answer your question: https://goo.gl/znGWbA . Keep us posted.