You made a similar thread like this that really should go in 'Q and A', after, I think,5 conscutive wins in Random Arenas you unlock team arenas(TA) where you can basically pick your own team which is 4v4 (the opposition is random ofcourse)
After 5 wins here not consecutive you unlock Heroes Acent(HA) which is 8v8 this is tough though and not very begginner friendly there are several kinds battle types here:
* Annihilation or Priest Annihilation
* Capture the Relic
* King of the Hill
* Capture Points
* Relic Run
what I think you should of done is joined a begginner friendly guild and asked them how pvp works here rather than just making suggestion threads on things that alreadt exist

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And if you can't wait to get 5 consecutive wins in RA (Random Arenas) scrimage,(1v1 though not officially called 1v1) with your guildies at your guild hall, this doesn't actually mean anything and there is no title and no faction(i think) to it but it's fun.
There is also Heroes battles (officially called 1v1) that is you have nightfall or eye of the north, that you can do but they are bit competitive.You basically need three heroes for this and you are ranked how well you do, i would stand clear of this for a while.
You can GvG(Guild versus Guild) with your guild and this is 8v8 put this is diffiuclt and not begginer friendly, once again you are ranked for this so stay clear of it for a while