if installed the membership plugin. i went through the wizard but did not setup a payment gateway. at this time all subscriptions are free and in there default state.
I selected a subscription and then entered the user information. the email was created and i could log in with the new user. when i look in the membership section for users the new user is marked as inactive with no subscription or membership level.
this is a new setup looking for the step i missed in setting this up.
p.s. this new interface you have will take some time to get use to.