The ultimate language challenge

I have been learning German for over a year and a half now and I decided that I should start picking up the pace a little, I talked to my German teacher at school and I asked her what the best way would be to motivate myself to learn 4 languages at once (they are all at different levels) and she set me a challenge, to write a 200 page book, 50 pages in each language, my languages are German (intermediate), Spanish (beginner but quite a confident beginner), Chinese (very low beginner) and Czech (no knowledge), I figured that I need the same level in the other three as my German to do it, so I started my task, I have already wrote a few pages of the German one after some extensive planning and I decided that I would write about how I learnt those languages in each section, if I work on it for 15-60 minutes a day then I figured that in 2 weeks the German section will be done, then it will probably take me a month or two to do the Spanish section, by this time I hope that my Czech level will be a little better and I will be able to get through those 50 pages in under 3 months (with the help of a dictionary) and then finally I will start Chinese which will probably take around 6-12 months because I want to use the dictionary as little as possible, so I want to get to an intermediate level in them all before I start their section of the book, by the time I finish each section I hope that the next language will be ready, I know that I can do the Spanish and Czech sections as in 6 months time they will both be at a high beginner level, then its just Chinese which will take a lot longer.