Upload Form

I wasn’t sure where to ask this question so I came here, hope that’s Ok.
I wanted to have customers upload a form so I could duplicate it for them, but getting the right plugin is not that easy as I don’t know what to put in the boxes to get the form to work. Naturally, it will ask for an email address so I created one especially for the form and won’t be using it for anything else.

I have also got a ‘success page and an error page set up on my website and on PayPal for when customers upload their articles. But one stumbling block that I came across was the setup of a folder on my Namecheap server to receive the article although I thought it would go to my email address as an attachment. So why set up a folder on the server.

I may be making this more complicated than it actually is.

Can someone explain in simple terms what I’m supposed to do?

Thanks a lot.