docs: Update First Boot docs

docs/setup-guide/mainsailos/first-boot.md

@@ -11,54 +11,56 @@ permalink: /setup/mainsailos/first-boot
 
 # First boot
 
-Insert the flashed SD card into your Pi and connect other desired/necessary hardware (ethernet, USB to 3D printer, webcam).
+Insert the flashed SD card into your Pi and connect any other hardware such a network cable, USB cable to the 3D printer, or a webcam.
 
-Power on the Pi and leave it to boot.
+Power on the Pi and let it boot up.
 
 **The initial boot of  MainsailOS may take some time to expand your "root" filesystem. The larger the SD card, the longer the first boot will take.**
 {: .warning}
 
 Initially the green LED on the Pi will be extremely active. After some time it will only intermittently flicker, indicating it has likely completed the boot sequence.
 
-The web ui should now be ready to access on your local network:
+The web interface should now be ready to access on your local network:
 
 ```
 http://mainsailos.local
-http://<IP address of your pi>
+```
+or 
+```
+http://<IP address of your Pi>
 ```
 
 ## Mainsail.cfg
 
- **Important:** Include the mainsail.cfg into your printer.cfg
+ **Important:** Include `mainsail.cfg` in your printer.cfg file
 {: .warning}
 
-Mainsail will not work unless Klipper is told to include its configuration. This can be achieved either by placing the contents of mainsail.cfg into your printer.cfg.
+Mainsail will not work correctly until `mainsail.cfg` is included in Klipper's configuration file.  Open Klipper's default `printer.cfg` file in Mainsail's file manager located in `Settings > Machine`.  If you do not have a `printer.cfg` file, you can create one. Add the following line to `printer.cfg` 
 
-To do this, open the default printer.cfg in the Mainsail web GUI:
+```
+[include mainsail.cfg]
+```
 
 ![screenshot-web-editor](../../../assets/img/setup/screenshot-web-editor-printer.png)        
 
 ![screenshot-web-editor-printercfg](../../../assets/img/setup/screenshot-printercfg-include-mainsail.png)
 
-Add the following line:
+and click on  the`Save & Restart` button.
 
-```yml
-[include mainsail.cfg]
-```
-and click on the "Save & Restart" button.
+{: .info}
 
 ## Updates
 
-Once you've successfully navigated to the Mainsail web ui we _thoroughly_ recommend that you run updates.
+Once you've successfully navigated to the Mainsail's web interface it is _strongly_ recommend that you run any available updates.
 
-Klipper, Moonraker and Mainsail have fast development cycles and whilst we do our best to ensure MainsailOS ships as close to the bleeding edge as we can, there will always be a short delay before releases make it into the image.
+Klipper, Moonraker and Mainsail have fast development cycles and while we do our best to ensure MainsailOS ships as close to upstream as we can, there will always be a short delay before releases make it into MainsailOS' image.
 
-We recommend that you enable and use the [built in update-manager](../../update/update-manager) to perform a system update, then update the stack components (Klipper, Moonraker, Mainsail)
+It is recommended that you enable and use the [built in update-manager](../../update/update-manager) to perform any system updates, then update Klipper, Moonraker, Mainsail as needed.
 
 ![screenshot-update-manager](../../../assets/img/update/screenshot-update-manager-example-not-up-to-date.png)
 
 
-MainsailOS is now configured, and we can get Klipper's [printer.cfg](klipper-setup) setup.
+MainsailOS is now configured, and Klipper's configuration file, [printer.cfg], can be setup.
 
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