Enemas are quite harmless. :) If there were any harm to them I'd be dead by now LOL! If you push the stick/point in too far you can irritate the inner end of the rectum. Just go slow and stay within your comfort range and you'll be fine! :)
You can substitute flax for psyllium no problem. Just use a LOT Of B when you first start out, and gradually increase the flax.
coated and cracked tongue means both colon cleansing AND fasting, but not just The Master Cleanser drink, you should only have 1-2 of those drinks a day and also the P&B shakes and spicy teas. Yogi's Egyptian Licorice Mint, INdia Spice, or Ginger would be good for you. :)
Don't start the olive oil until your tongue is clear. It can be cracked, just not coated. When you do start the oil, best to take some digestive enzymes or peppermint tea with it.
enema bottle? Do you mean Fleets? Avoid fleet enemas! Very bad. ORder a bucket setup online, or get a bag from Walgreens or Walmart for cheap.
Hope that helps! OH and in case I forget to visit this forum, feel free to ask questions in my forum, I always see those. :)