wow most people started early. I started the dragon slayer when I was around 60...but yea..if you back enough food you should be fine and there's the run/t option if u have any problems. One way to find out is see if you can kill 5-10 lesser demons w/o using up all your food. If you can then you're good. I believe after you're done...it would be wise to go south and push the "odd looking wall" since it'll give you access to that area later and exit the karamaja doungeon through the climbing rope..