[Plugin: Job Manager] Customize form

Hi:

I’ve downloaded and installed your Job Manager WP plugin. Everything looks pretty cool.

However, I am going to add lots of fields and labels to the form. I have reviewed this page:
https://code.google.com/p/wordpress-job-manager/wiki/CustomApplicationForm

But, I’m still not sure what php form to edit and how to do it. (I’m not the master of PHP. LOL.).

Can you please advise?

Peace,
Loren

https://www.ads-software.com/extend/plugins/job-manager/