could you put in a walkthrough for any that needs it and is there a magic swordsman class and a dual wielder class and wont each class have their own questline oh yeah and could you do a secret quests where you don't get many hints about them but certain conditions must apply before they are active
I can't really make a walkthrough that's up for the players/streamers. As for dual wield, you can do it if you learn the skill. There are "hidden" quests/events that will trigger if you done something before, like getting two party members or a questline that gives you something like the exotic vendor or the hidden treasure that you find around the map.
The best example is the Fast Travel from Bror Village. That's a village that has no connection with any place, but, if you do a questline, and do certian thing a wolf pack will attack the village, if you manage to defend it, you will get a new traveling route from there. There are a lot more exampless you just need to play and explore for yourself. As for the magic sword thing, there are currently 8 classes and 2 classes that can be "evolved" like paladin to blood knight if you find the secret place and do the ritual that evolves your paladin giving different spells.