Did you get directions with your board? It is important to have the bucket high enough, otherwise it will take hours.
If you don't want to buy ky jellie or glide you can use the olive oil.
The easiest way to get the tip in, is, while you are still standing, put oil on the stick. And then put it in your anus to lubricate inside. After that you put some more oil on the tip and connect in the 3" tube. One of the reasons it is hard to get in because the layers of skin. When you guide the tip to the hole, use both hands to open the hole while you work the tip in.
If it does not go far enough open the water to clean out the lower part of the bowel. Close water and push tip further in.
Indeed the tube goes on the long tube and the tip goes in the short tube.
You don't have to worry about too much water getting in, because it will just start running out.
You will find that the water goes further and further.

I don't understand about the water not going up. My hose has a hard bend that sits on the edge of the bucket, so it is not able to close up.

So this was a graphic description, who would ever have thought that we would talk about this stuff. We have gotten so comfortable with this.

Johanna

Others may see this 1o year old post but maybe this helps someone.

PLEASE don't use KY jelly because it contains solvents which have no place in the body. Natural oil such as coconut or even butter should work well.

And as for flow regulation, you could pinch the tube with your fingers to regulate the flow but better is a plastic or metal adjustable tube clip to manually regulate and stop flow.

Once necessary length of hose for your set up--including enough to allow you to reach the tube--is established cut it to size. Water flow in an upward direction ought not to be a problem if the source is high enough to create sufficient pressure.

Last question, sorry no clue what it's about.

To stop a tip extending in too far into the rectum I've used a thick elastic band, soaked a little in collodial silver, vodka, or diluted food grade hydrogen peroxide solution, to ensure it's germ free, wrapped round the tube at an appropriate distance from the tip. With flexible enough tubes, I understand over insertion may not be a concern.