I usually hit 10 right before I kill Slave-master so aim for that milestone
Most classes you should be at level 10 minimum by the time you finish all this aion kinah (depending on how much of the Volcano mobs you kill.) Good way to judge how you're doing, I usually hit 10 right before I kill Slave-master, so aim for that milestone.
Switch back to daytime, gather up any quests on the way to the boat, and head for White Sands. You should have at least 9 quests for that area now, do them all except for finding Horensia's necklace. Mobs are a bit higher level there and you need to come back anyways, but it is near where you get the bottles of rum and wine for Ninus, so your call.
Once all the White Sands quests are completed and turned in, you should be around level 13 or so - maybe 14 depending on how many mobs you had to kill to get quests done. If not, you’re very close. Your class weep requires level 20, but no worries.
Pick up quests anytime you see them, btw, you'll do them all eventually. Make sure you grab all the quests for Under-halls you can, getting rings off the corpses is one that is missed sometimes since the quest giver is a bit out of the way.