Faction Change and do all quests ,possible ?

hello all ,i want to know if possible to change faction ,how to do it ,and things to survey when we do this.

For example ,i would like to join Kurzick ,but want to start with Luxxon before for quest and explorable area is it possible ?

Soryy for my bad english . tia

it is possible to take both the To House zu Heltzer and To Cavalon quests. so yes, you can do both sides.

this should also be writen in the FAQ, check it out next time