I think it is a mix of that. I fear it could be too bad and my ideas are very chaotic and its soooooo much to write. But I will start with my map today.
Courage could be the right word if you mean you wont write it down because of fear - (of it being bad or it being too much work etc) - "resolve", "will", "determination" all similar in meaning where it might mean you wont do it because your too lazy or its too large a task or too much of a burden. Courage could well be the perfect word tho if thats what you mean. Your English is near perfect so don't worry about that.