Mountain Biking Training

My uncle recently took me mountain biking on quite a simple course.
IT scared the hell out of me. And getting up the mountain was too hard work. Does anyone on here do mountain biking and know any good ways to make going uphill much easier?

Im not very fit, im quite overweight. Im described in school as "Chunky" :P
NOT Obese or anythign but not muscle or fit :D

Anyone got any tips on hwo i should train for going uphill.

( NOTE: it took me about 1 hour to get up to the top )

Which my uncle said wasn't very bad, but i wanna try and get up without being dead on the floor :D


Thanks +REP for those who can help or find any sites that give very good info :D

well i am a regular mountain biker, as i have a woods behind ma house. the best thing to do, in all sports, is keep at it, an it will get easier. also go at your own pace, dont rush to keep up with anyone as u will u tire out. wen u do get to the top, dont sit down, stand up, as it will help you get ya breath back.