New player looking for help

[Seeker0fTruth]

And since your a lancer if you wanna go for dragoon job Get your marauder to level 26 for mercy stroke and pugilist to 15 for interal release and second wind both are very helpful.

So even though all the classes are ranked separately (Almost like an entirely different character), there are actions I can assign to my hotbar that are only unlocked once I level up a second class? Then that action can be used on either class? Am I understanding that right? Sorry I know these seem like noob questions that are probably second nature for you, but theres just so much to learn at first.