Hi, the first thing you need is an enema bag. In the US, you can usually find a good one for about $15 in any major drug store, and it will last for years.
Here are a few web links with more information that should be helpful:
The temperature of the water should be 103 degrees F at preparation time, and mix in one teaspoon of Sea Salt
for each pint of water. If this is your first enema, try to take a quart, then each day add a few ounces
more of water, until you are able to accept a full bag without excess discomfort other than fullness.
I can't imagine doing a fast without my daily enema.
Best wishes for your success!!!