Eventplugin for offering free of charge training courses

Hello Community,

I would like to set up an event calendar on my site, since we offer free training courses.
Ideally, there should be a calendar on the page, where the different trainings are displayed. By clicking on a certain training date, the detail page of the training should open, where the interested party can then register for a place. Thereby one place should be automatically subtracted from the total number of places.

Important perhaps again: The trainings are offered free of charge, a connection to a booking system is not necessary.

Does anyone have a good plugin tip for this?

Thanks in advance.