How To Change These Details On Customer Emails?

I'd like to know how to change the default message that people see in the emails my web site sends out. After the order has been placed, they get a confirmation that says,

Hello Joe,

The status of your order has been changed to paid.

(see screenshot attached)

Also, on the bottom right of the email it says "Get Social" and under that there are icons for Facebook and Twitter. However, if clicked, the Facebook icon takes you to the Facebook home page, and the Twitter icon takes you to the Twitter home page. How can I make it so that when clicked, these will take the customer to my company's Facebook page and Twitter page?

(see screenshot attached)

Thanks in advance.

[attachment=14900:Screen Shot 2021-02-27 at 12.57.41 PM.png]

[attachment=14901:Screen Shot 2021-02-27 at 12.55.46 PM.png]

Screen Shot 2021-02-27 at 12.57.41 PM.png

Screen Shot 2021-02-27 at 12.55.46 PM.png

Top right menu

Design, Documents

hmm, seems I am wrong, that edits the email, but not the footer

EDIT 2, try this

Top Right Menu

Design, email templates, code snippets, footer

My Design menu doesn't have Email Templates. It just has Templates. See attached.

[attachment=14902:Screen Shot 2021-02-28 at 8.08.21 AM.png]

Screen Shot 2021-02-28 at 8.08.21 AM.png

dispatch=email_templates.snippets

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