Join a Union. Join that Union's communication channel (most likely Discord). Beg for them to carry to carry your Dark Ults. There, done, no more failed hosts ever again.
It will be a while before you can complete Guild Orders, but you can get some points. You have two weeks per GO, so try to do all the missions that don't require you to kill the last boss.
I doubt you'll have any chance against AQ4, but you might be able to clear the lower AQs. The only way to find out is to try.