Can anyone help me with a sheet that has both forms and workflows included?

edited 10/19/21 in Smartsheet Basics

I am trying to create a sheet that my manufacturing plants can use to submit service issues and notifies the servicer, then the servicer can provide their solution and close the loop. Below is my desired functionality of the sheet.

I need to utilize forms, because I do not want the vendor to be able to access the sheet and see what issues we are having with other vendors. I would like the workflow to alert the vendor contact email that the plant selects but I can not get it to work. Please help!