No need to apologize for lack of coding knowledge, with some more experience I'm sure you will be an expert soon enough.
Good catch with the extra double quote in there, it will definitely cause problems, you can just remove it after the 0.
As for where to put the binding for your upload you would add this into the WA_Universal_Email > Templates > contactus.php page below the loop like this:
19: ?><?php echo $WA_DFP_UploadStatus["WA_UploadResult1"]["serverFileName"]; ?>
20: </div>
21: </body>
22: </html>