Main Story Ulimate Weapon

[AnnaDel]

I am really new to the game, but have got to lvl 53 and stuck on Lahabrea, the last, I hope, part of this main story. I read online, that it is supposed to save the game at the point you have reached, to continue later, as it takes way too long in one sitting to do. But, if I do quit, as it has got too late, then when I restart the next day, I have to re-run the whole thing again from where you leave the airship to do it all over again. Now done this 5 times, but seems I am unable to beat Lahabrea with an NPC group. Not sure I am good enough to run with real players. Can any one explain please what is going on with this. I come from ESO and never encountered such a long drawn at story quest in any game I have played b4. You cannot even skip the cut scenes. Have to watch then over and over again. Or, are there any players willing to help a noob to get thru this. Thanks in advance.... I am playing as a Marauder(tank)