Assistance With Membership Plugin

I am about to launch a premium website utilizing the Membership Plugin. I've made several attempts at setting up coupons so members can create an account and use a coupon code for a certain membership level.

I am just having a hard time situating the actual proceedure for new members. (For example: Go to the signup page, create an account, subscribe to the nutrition program using the provided coupon code. That's it. Signed up and registered.

Our members are signed up through the Los Angeles Unified School District so they provide the coupon to their teachers.

A little clearer direction on setting this up would be great.

Thank you.