Fear is normal for a number of reasons, so don't let it affect your underlying judgement.

Be careful though of entirely arbitrary challenge based experiences if you want to have a pleasant and low resistence kind of trip. Why six months for instance, like the ridiculous trend in climbing at one time to force entirely straight routes that followed the path of a falling drop of water. Consider the difference between some kind of challenge based trip for self growth, history (not in this case), embracing difficulties, building up self-image. The kind of thing that succeeds only if there is a fair amount of resistence overcome. And a trip that is intended to flow, and not consist of fighting the current, in general an unhealthy, and unprofitable activity. Decide what it is you want from the trip and then go after it. Often what people seak is a little bit of everything, rather muddy, rather that truly identifying what they want to do. When you think about your objectives, who is in the frame. How much of what you think about has to do with how it will be seen rather than what it is you want.

http://www.youtube.com/watch?v=myYV4...eature=related

Check out Abraham-Hicks. I am not into this stuff, but it represents almost the opposite of the way I live, and so the ideas of illignment are at least a window for me into a different way of seeing things. So having been exposed to their tapes by a friend, I do at least identify when I am trying to swim upstream. I will still do it, but at least I am aware of it.