automatically updating item name base form with Make

My Monday Form has one “Full Name” field, and when it’s submitted, the main column gets updated with that value.
I want to change the form to have two separate fields: “First Name” and “Last Name.” Then, when the form is submitted, I want the board’s main column (the first column) to be automatically updated with the combined value of those two fields (e.g., “James Parker ”).

Can you please help me set this up or advise how to do it?
Thank you!

You’ll want to use the workflow center