Regarding your myList function: I’m glad this works for you! I’ll just point out that, since you’re using a ‘set list’ block rather than a ‘append to list’ block, you don’t need to include the ‘count with x from…’ block. It just means that you’re calling the same ‘set list’ block multiple times.
These blocks will be fine as long as you will only ever have 2 rows in your spreadsheet. If you want your blocks to be more flexible and be able to call more/fewer values in the future, try one of the methods in my previous comment. I’d be happy to give advice on either one!
Regarding your multi-dimensional list, what you’ve done is exactly right. This will provide the list [[AAA,BBB,CCC],[DDD,EEE,FFF],[GGG,HHH,WWW]].