Roadhog 4 controlling resolume arena 4 over Artnet

I'm trying to control RA4 with my roadhog4 over Artnet so I can include clips and manipulations in my show. I've seen the tutorial video but I'm not able to make it work. I'm a virgin when it comes to networking. I know how to set IP's but everybody keeps talking about subnets and universes??? :-@ . I'm turning bald over this.

Can someone talk me true it?

Thanx.