I see alot of new player, with no money...here's a quest you can do on normal, takes under 10 mins to hit where this first PD is. Grind this to get some starter PD's.
Also, on ult, theirs one at the end, and luck mats sometimes too, but ultimate is pretty serious, i wouldn't recommend going alone.
First load a Episode 1 game any difficulty, but if your grinding for pds, id go normal. (WOI is better for pd farming once your levels are up)
once you enter this room, your