I just started to play this great game and I was just wondering how to travel to other shards. I didn't play the whole campiagm just enough for the basics. I just wanted to know how you travel between shards.

Have you completed the tutorial level? It should be fairly apparent how you do it once you move to the Astral for the first time.

I didnt get that far. Too excited to play haha!

Okay. You need to finish the tutorial level. At that point you'll move to the astral plane and will be able to see/select other shards. You'll also have a sarcastic little assistant who will explain some things (and more as the campaign progresses).

You only move to a new shard once you've completed the battle for whichever one you're in (whether you win or lose it).