I didn’t see anything about it on the FAQ but do I need to reserve a server by myself for every match (EU and NA) or is there anything like a home team against visitor system deciding who needs to reserve one?
The home team is typically responsible for reserving the server.
Could you please specify where I can find this online scheduler for the sake of preparation?
Once the season starts, you’ll be able to view the scheduler on your match information page. It’s the same page where you’ll find match comm info, so it’s pretty easy to access. Unfortunately you won’t have access to this until after your first match is scheduled.