Simple stupid question I'm asking myself but it is said that a character can endorse all classes BUT now the concrete problem is how to change the main story quest if I changed virtually my main class ?

Let me explain .. I started as an healer (CNJ) but soon saw that I prefer to play a tank MRD. I leveled up my main Healer CNJ up to lvl 18 but now I wanted to change my main class to a MRD. Problem I do not get a new main story quest but class quest it's ok.


But now the problem is that since my main story quest was for the CNJ can i do these quest line with my MRD (without witching to CNJ ) ??

Furthermore the problem is that the main story quest also guides you through the leveling but now as MRD without a main scenario it is hard to find quest to progress til lv 50 ..

What am I doing wrong? Simple question how to get a NEW main story quest (Scenario) .. ?

tjanks for your help