I've experimented loads with PH, with varying degrees of success. I've got my stick blender method off to a T because I've been doing it for so long but the method I'd recommend to beginner is as follows.
Make up a shake with hot water and pour it into a bowl. Sprinkle a couple of teaspoons of pH on top then stir briskly with a fork or a balloon whisk.
At first it'll seem a bit lumpy but persevere and in less than a minute it'll smooth out. It should thicken out a bit (to a consistency a bit like semolina). Sprinkle with cinnamon if you like then eat - remember it'll continue to thicken as you eat it.
You can experiment a bit - adding more PH if you prefer.
As I said, I'm a dab hand at doing it with a hand held stick blender but if you have a go at that, they key things to remember is not to have the water boiling hot and not to over blend - both those will result in 'gloop'.
I do my own personal porrige by tipping the shake powder into a mixing jug containing 300ml hot water and just throw 3 teaspoons of PH on top. Then I plunge the stick blender up and down on it for about 10 seconds - done!
Remember, it's not going to be anything like Scots Porrige oats, just an approximation more akin to semolina ... but acceptable on a VLCD (plus it keeps you regular). At the end of the day though, it's not everyone's cup of tea.