LDArray extension

[AbsoluteBeginner]

I am trying to understand the LDlist Objects,  here is what I am confused about:
vocabList[1] = "alpha"
vocabList[2]= "Beta"
vocabList[3]= "Zeta"
vocabList[4] = "Eta"

...

So, what am I doing wrong here?

(translated by Google translator)

Hello Yumda. 
It seems to me that you are not looking at the information that is in the link: https://litdev.uk/LitDev.html

You initialize the first element of the vocabList[1] array in the same way you would use to work with a regular SB array: vocabList[1] = "alpha"

But, you want to have a LIST, not a SB array. Therefore, you should use methods that are designed to work with a LIST.

LDList.Add(vocabList, "alpha")
LDList.Add(vocabList, "Beta")
LDList.Add(vocabList, "Zeta")
LDList.Add(vocabList, "Eta")

( I will continue later )