Need some assistance on a complex, to me, membership site

Client site is currently in Joomla, and they are switching to WordPress and I am trying to setup Membership so that it functions as their current site, spedweb.com, does as far as membership. The staging site - sped.webpersonas.com - has Membership installed, but I really could use some guidance on setting this up or hiring someone to do it.

Thanks, David