I think first of all you should understand that you need that detox.
Its not so difficult as you think. All problems are in our head. On juices you can live for a long time, but you should drink different kind of them (to get more vitamins & nutritions).
All energy of fruits are concentrated in juice. And juice gives more energy than any single fruit. So if you are afraid that you will't have energy to do your ordinary stuff you are wrong.
You should try it.