Hey there @Namdar88060 - great questions! Check out our New User Guide and our Company Admin Guide - both will prove helpful as you figure all of this out!
At this time, there is no way to automatically push invitees over to an online event type once an in person event type is fully booked. However, you might get somewhere by implementing routing! Routing forms let you request information such as industry, company size, specific interests, etc. from website visitors and automatically direct them to a specific scheduling or web page based on their responses. It's great for screening and qualifying sales leads on a website or matching clients or students to the booking page of the right subject-matter expert based on their interests, program, or other criteria. You can read more about setting up routing forms, here!
You could use routing to ask invitees what they are interested in - online or in person - and then route them to the appropriate event types. In the case of in person events, you can also set up logic so that once those event types have no availability the invitees are shown a custom message asking them to please go back and book an online meeting because in person meetings are unavailable at the time.
I hope this helps! Please let me know if you have any questions!
Check out these articles about routing, as well:
