make contactform easy changeable

Hey there,

I face a small challenge:
My customer wants to offer different seminars and wants to make the “sign up” for the seminars via a contact form.

I planed to do it with checkboxes, so you can select which seminar(s) you want to visit. Since the offered seminars change alot, I search for an easy way how I can add/remove checkboxes depending on the currently offered seminars.

Is there a way I can configure the shown contactform and the E-mail which will be sent in an easy way? (the customer isn´t that good as technician, so letting him change the “contactformcode” in the backend won´t be a solution. There needs to be something easy like “fields” which say which “words/seminars” should be offered in the backend)

I´m happy for any tips. Maybe it´s helpfull to tell: I got a ACF pro license, so maybe that comes in handy here.

Greetings
Marcel