newb walkthrough question

I have no idea how to go to the next town. I am in Zos shivros Channel and I cannot go to cavalon becasue i am not luxon, does it mean I cannot go Bai Passu Reach and other towns further? I checked guildwarwiki and it said I have to go Bai Passu Reach from Cavalon.

On the other side I am in Altrumm Ruins, do I have to go Breaker Hollow to reach the next mission place?

You need to follow the primary quests (City under attack). There is one more mission before you can enter Cavalon and House Zu Helter.