Fitness4All - Zumba Classes

I am about to start my website but at the moment the only thing I have ready are my Zumba classes. Which I want to offer pay as you go option as well as class packages. I want to be able to monitor this on the app and for clients to see how many classes left they have. I want them to get reminders of how many classes they have and I want them to get receipts when they purchase through my website. I also want to add a section of my online personal training offering a 30 day challenge and home workout but I mainly want to focus on the Zumba.