Create new datatable with info from another

i’ve a datatable(DT1) with 5 columns, {“name”,“surname”,“age”,“date”,“gender”}
my goal is to append some info to an existing excel table, that have 15 column, including those of DT1 but with different name and order. Excel example: [column1, column b, column c, first name, column d, second name] ecc…
How can i pass values from dt1 from a blank dt2 leaving the different column blank?