So I have never worked with DD array so how to put it in the DD array column is what I need help with

Hmm, some of the answer in indefinite number of columns show that, so Basic debugging checklist to Data::Dump::dd some data to find out which one is the one you want

Another example of working with arrays of arrays is in How to traverse a two dimentional array in a constructor? including a link to a free book which teaches this