Questions about Hangfire with a console application

I'm trying to determine if Hangfire will work for us. We have a .NET Core console application that performs various scheduled tasks.

Is there any way someone could address a couple of questions?

1. It appears this requires that my console application is always running. Doesn't that mean that my application should really be a Windows service? So that it's always running?
2. Can tasks be added, removed and modified while the application is running? And can they be modified from another application?
3. When multiple tasks are scheduled in an overlapping manner, does Hangfire queue them up so that only one task is performed at a time?