The cleanse isn’t meant to be done long term; it won’t even come close to killing off all of the candida in the body. I would consider starting phase 1 of the diet when you are ready…
I also would not do any kind of strenuous activity for a few months until you can get your “legs underneath you.” Fighting candida is very taxing to the immune system and the last thing you need is to suppress it even more by participating in strenuous activity. If you do “have to” do physical activity, I certainly would not do it while on the cleanse which is very taxing in itself.
When you do start phase 1, I would look at trying out my teff bread recipe for some energy. Buckwheat and oat bran are other good sources of energy. I would also eat 2 salads or more a day if possible.