Abstracting the idea of state of happiness

I don’t know how to make abstractions. I have searched the internet, but so far I haven’t found an example. I hope you can share your thoughts on how to do abstractions. I just want to understand the state of happiness, which is why I am asking about abstraction.

Here is my perspective on the flow of my abstraction:

Anything that can be described as happy → Being Happy → Happiness / State of Being Happy → ? → State of Happiness

I have only limited knowledge of English, so it is difficult for me to do this alone. I also have some questions in mind, which are as follows:

Using the example "Happiness as a state of being happy," happiness will be the common state abstracted from what “being happy” stands for, right? Based on your opinion, what might this happiness, or the resulting common state, mean?

In getting the idea of happiness, does it vary from person to person because it depends on the number of particulars of being happy that each person considers? For example, if person A observes 50 things that can be described as happy while person B observes fewer, then each observer will have a different definition of happiness. If this is correct, despite this variation, the most general meaning of happiness is still the state that is abstracted from all things that can be described as happy, right?

If I am going to elevate my abstraction one step higher from Happiness, what possible particulars to which I could draw out the “idea of state of happiness? Can you provide some examples of these particulars?

Thank you.