Sounds like your right on track by starting with the colon cleansing.
By starting there you have opened up the pathways so other cleansing will go smooth.
Next up would ideally be parasite cleansing.
This will help eliminate any parasites in the liver so when you start flushing the liver the parasites will be gone.
Then the liver.
You can really overlap all three of these, but trying to keep somewhat of this sequence would be ideal.
The liver is probably the most important here. It has over 1,000 different functions in the body and is very key to optimal health.
Probably the best parasite cleanser you will find is Barefoots "dewormer".
Go to "The barefoot herbalist" forum to find it.
Once you get these three areas well under control the body will doing much of the cleansing on its own
For some really thorough house cleaning and superior health, the different forms of fasting will take you there.
Through all this you should start finding your own healthy diet.