Registration Capacity

Hi, I want to put the registration cap in my events. In the events, we have enabled two types of registration : In-person event and Virtual event.

I want to put the cap for both types of registrations. Can anyone please explain me the entire process for this. Though, I am aware about the token (program-capacity) which can be added in the event, the webhook service and the campaign. But I don't know the exact procedure of doing it.