LF > Low Level PQ party

Quests give a lot of exp, you can skip henesys by doing some quests. KPQ tends to have more people but it's also hit or miss depending on the time.

There are some guides out there that help you hit 35 quickly through questing, you could follow those to whatever level you feel you'd enjoy KPQ the most and move from there.

Good luck! LPQ is also pretty hit or miss depending on the time, so if you find a group willing to go often then I suggest sticking with them as much as possible. In between pqs definitely look up some training grounds guides or just do whatever quests interest you.