Hi @mwilliamsf,
The send an email part need to be achieved by starting a Flow in PowerApps. Follow the below steps:
1. Create a flow like this:

2. In the app that you created using Excel table, add a button.
3. With the Button control selected, select Flows on the Action tab.

4. In the pane that appears, select the flow that you created in the previous procedure.
Note:
If the flow that you created isn't available, confirm whether PowerApps is set to the environment in which you created the flow.
5. In the formula bar, add the following:

DataCardValue1, DataCardValue4, DataCardValue8 are the 3 fileds that you want to show in the email body.
With this app, when you click on the Button, it will trigger the flow and send an email with the information you need.
Regards,
Mona