I agree w/ Crazy, get used to the bike, you will not find a better bike to begin with in the woods, perhaps you were trying to bite off more than you can chew, But I can tell you the KDX will chew if you're up to it.
Maybe ride it somewhere you can just get to know the controls, clutch, throttle, shifting. Then go tackle the hill climbs.
Your clutch basket needs some work and you should do it NOW, it will make the learning curve much easier all it takes to repair is a good file and a bench vise. and by God, put on thoise barkbusters, or buy a few levers and carry them on the bike w/ you. Too bad you can't buy spare fingers....
Have fun on the trails and report back soon.