I don't know exactly...But me too started Geography as my subject for any exam,for first time...I have previos experience of teaching Geo to O-Levels, I found it easy...And now I have started to study DeBlij and Strahler...I found them more conceptual rather than a cramming material....So, If you are a man/woman of good memory and bad concepts then I think don't go for it..Yes, If you have good past experience of grabbing the concepts easily..Then Geo is Your subject...Go for it and just rock..