It'd be nice to see the stories subforum active again! I've been focusing on coursework so I can't do any sign-up projects, but if you have the time, you should totally do it!
No. Schematica mods are not approved on the network as seen here. This is because it renders W/E useless and is therefore banned from being used.
If you have any more questions, do not hesitate to message a member of staff.