You are right about being half way to DragonSpire but I would never go to DS at that lvl. You need to be at least lvl 42. (But I came there at lvl 44) :-)
I agree, being at the highest level you can will make it easier. The battles in DS are tough. I have had to help out lots of low level wizards in DS because they were not ready for the high level monsters there. Be patient young wizard!