Stormblood story skip when?

[Iscah]

It feels like I'm giving up if I go as anything else.


also I really don't care about that story after the encounter with xenos, so the world could blow up for all I care.

It isn't giving up at all. It's a game where by design, you can choose whatever role you want to play.

Tank is a role best played with experience. Right now you're 'in training' and need to get that experience, so do it in another role so you can watch and learn now in preparation for being a good tank later.