Hmm well personally I would just start another character on another server, because you are so low level. Which part of the dungeon are you having trouble with? If it's just getting into the dungeon I can guarantee you it's much easier on at least the Chaos and Aether data centers (when you do instanced content it pulls from the whole data center and not just your sever). I have a character on each and have tanked with both before.

If it's doing the dungeon once you get in, then at least getting rid of a language barrier would be a place to start. Gladiators are tanks so they are expected to engage the monsters first, and keep all the aggro. With Gladiator, I'd pull with Shield Lob then after they are closer, Flash a few times, then start the combo. Also don't feel too bad if you can't hold the aggro, lots of people who are level synched will pull the hate from your regardless, because even while level synched they will generate more aggro.

Edit: Yeah it'd be nice if they'd suggest the servers. I know they just give you the basic area each data center is in (or you can be like my friends who picked a server based on their favorite, that's how I ended up on an EU server, haha.)