Dynamic table_array value for Vlookup function

Alright, I am trying to figure out if the following is possible.
I have in F2 of the attached excel file tried to get the table_array value for the vlookup function dynamic. The input for the table_array is in the column title (line 1). I cannot make it work despite my research.

Can somebody look into it to let me know what is wrong in my attempt?
Column D and E are the expected outcome (function not dynamic), column F is my vain attempt...

Thanks very much in advance for your attention.

Best,

Rox