Hello Patrick,
1) Tap or click here for a free course on Youtube. Or alternatively, you can check out this Udemy course for less than $10.00.
2) Click the Start icon on the taskbar
Click Settings
Click Privacy & security
Click Windows Security
Click Virus & threat protection
In the Virus & threat protection section, you can see which antivirus software is installed on your computer.
You can also check if Windows Defender is active by looking for the shield in the System tray.
3) You posted to Kim’s wall. Questions should be posted in the Q&A forum. You can navigate to that section by using the left-hand navigation bar, or if you are on a phone or tablet, click the three lines / Hamburger menu.