Fixed Term Membership Site

Hello,

I m trying to create a FTM site with wordpress.

I d like that people who come on my site have to surscribe and pay in order to recieve weekly email messages with courses inside. I ve already got an auto responder plugin (BFT Autoresponder) to make it automatic.

But now I don t know how to make a “paid registration form” linked to this autoresponder.

Its been several days that I m looking for something secure and free, in vain.

Please I need your help!!