I have a form named company details with a single line field named company name and multi line field named "user email list"

I have a second form named user profile. In this form there is a lookup field that shows a dropdown of records of all company name entires and an email field.

I want to do the following in workflow

1. when a user submits user profile form, their email will be stored in the "user email list" field in company details form

2. In Company details form report, I want to create a button that allows a user to select a company name and send an email to all email's in the "user email list field"

How can I do this?