
The pressure is pretty much a constant unless you lead something that's just a very small, close-knit FC of friends. It's just something that comes with the territory that you have to deal with. As for role-play, forcing anyone to role-play won't help, but encouragement will. Make events for them, start plot lines, give them role-play hooks. As the leader, you have to at the very least give them something to start with. People often join in an RP FC with the idea in mind that you will give them things to RP, so that will be their expectation. Also, let them know they're all encouraged to make their own events for the FC and start their own plots that the FC can join in on. They'll have fun making events, and it will ease some of the burden off you.
It also helps to really nail down the focus of the FC and communicate it to your FC members. Are you strictly an RP FC, or partially an RP FC? Are you light RP, or heavy? Are you heroes or villains? But ultimately, it all comes back to the fact that leading an FC isn't easy. There's a reason not everyone wants to make their own FC. It's work. Leading people involves constant adapting, listening to their feedback, experimenting with new ideas and watching for the results, etc.
It also helps to really nail down the focus of the FC and communicate it to your FC members. Are you strictly an RP FC, or partially an RP FC? Are you light RP, or heavy? Are you heroes or villains? But ultimately, it all comes back to the fact that leading an FC isn't easy. There's a reason not everyone wants to make their own FC. It's work. Leading people involves constant adapting, listening to their feedback, experimenting with new ideas and watching for the results, etc.