Can't find games

Hi.

I finally got around to downloading Halo 5 but can’t find any Multiplayer matches at all. I tried partying up with a mate also, both of us live in Australia and no luck. My mate says he can usually find games so i’m not sure what’s going on. It’s an issue when I can still find games of Halo 4 on the 360 but I can sit in a lobby for 10min on Halo 5 and it remains empty. Don’t know if this helps but I have an Open NAT and solid connection.
I know for a fact this is an active community so my only guess is something is going on with the servers at the moment?

If anyone could help or provide info that would be great. First time running the game and kinda disappointed I can’t experience the Multiplayer properly yet, Campaign and Forge will have to satisfy me for the moment.
Thanks.