you don't need to use a recordset for this.
Make sure that the insert record behavior does not redirect to another page after the record is inserted, then add Universal Email to the same page.
If you select the option to Create an Page for the email, and select to use one of the templates from the dropdown list, all of the code needed to write the form data to the email will automatically created for you.
You can set the Universal Email behavior to redirect to the thank you page after the email is sent.