What configeration should I use?

I want to do a group program in May.

I want people to be able to sign up in April and get content as I publish it(scheduled posts)

I want them to be charged $150 for the month or 2 payments of $75

I want them to have access to the material for 3 months. (but be able to download it)

So I will make a welcome page with details.

Posts with the content for them and a menu with both for easy access.