Well, yes and no. Watch a video (and if you search hard enough you will find one for each role) and at least you will know what to expect. Theres nothing more disheartening than having a tank or healer join in titan ex and the conversation going like this:
Tank/Healer: Hi first time
Party: Ok, watched a video?
Tank/Healer: No I like to wing it
Party:....
Im still working on my titan ex clear and Ive watched several videos, I know whats coming but like you said watching them =/= experience but I know what to expect and I don't just stand there picking my nose staring at the floor of bombs like they're going to magically tell me which ones about to explode then what titan does next.
Edit: With your saxophone thing id at least expect the new players to know what buttons to press to use skills and move etc.