Sending email/contact to one user in a repeating group

I have a repeating group list of tutors. I would like a user (not a tutor) to be able to send a message to one of the tutors in the RG. The tutors all have email addresses but these are not shown.
I would like add a btn in the RG cell that allows the current user to send a message to the tutor in the cell?
How to do that? Thanks!

Add a button

Start workflow when button is clicked

Send an email to Current cell’s User’s/Tutor’s email

Show a success alert/popup/something

That Easy? Thank you.