You cant get to the Starforge untill you get all the Star maps. Now you just finished the Laviathan so you should have one Star map left to get (Im guessint thats Koribban). Then your on a one way trip to the end.
You cant go back to Dantoonie (Unless you have activated the Galixy Droid glich....dont ask how
) Though you should be able to finish off the other quests that Hulas gives you, just go speek to him again on Manaan.