Automatically assign a basic entry level membership in Protected Content when signing up.

I have installed Membership and Protected content plugins.
It looks like these 2 plugins have overlapping features so I think I can just stay with "protected content" and deactivate "membership"
however, when a user signs up, he/she does not automatically get assigned a "entry level" membership in protected content. I would like to set it up so any new sign up gets "website membership" automatically. thanks Aurora