Sorry, but I have to ask you something else.
Is there a way to hide some of the quests until others are completed?

Hi,
yes you can do this.
Use the Requirement "Quests". The Ingame texts will help you when creating/editing your quest. You simply have to put the name of the Quest which is required to start the next one.
Other requirement options you can find on the wiki page: https://github.com/Blackvein/Quests/wiki/Configuration

@Loivado Thanks!