Appointments

[RedEmpressTarot]

I am building a Weebly website selling services that require my availability on a specific date and time. I need to embed a calendar into individual items for sale.  So the customer can see my availability, choose a date and time, then pay at that time.  

Does anyone know how to achieve this? I can’t find info on what app has this capability or how to make it happen. I’d like the simplest way.