HI brie68510. That's a good safe way to start learning about soapy enemas. You did not say what total volume you took but work up slowly as your bowel adjusts. A teaspoonful of Johnson&Johnson baby shampoo per quart of warm water is a good ratio.
If you decide to try Ivory soap mix your solution in a large pitcher and swish the bar of soap around until the liquid is too cloudy to see through it. It is also easy to grate a bar of Ivory soap and store it in a sealed jar. You can then add measured amounts of gratings to your water and get an Idea of how much you are using and the gratings dissolve rapidly in warm water.
You may read about using stronger or scented soaps on this site. For your comfort hold off on stronger soaps until you have some experience.
You may want to use a "rinse" enema after a soapy one. This can help if you feel irritation in your rectum after the sse. Using warm water with a teaspoonful of common table salt per quart is a good ratio. The rinse enema may become part of your routine or you may just use it if you feel irritation.
Anyway, take your time. Don't try for large volume or highly irritating solutions until you have some experience.
If you want to get the feel of a sudden, strong urge that you cannot hold try using a very small syringe to inject 5cc of glycerin, alone or in 5cc of water. This is a safe and highly effective small volume enema. You could buy a package of Fleets Liquid Glycerin "suppositories" and use those but its a lot less expensive to buy a bottle of glycerin and an infant ear syringe. You can draw up the glycerin/water mix into that and inject it while in the knee-chest position. You may try a slightly larger volume in the ear syringe; 10cc glycerin, 10cc water. Just be aware that glycerin works very rapidly. Plan to have a toilet available when you inject the solution!