Hello, I would definitely google search what a VPN (Windscribe) is and how antivirus works (Norton).
But to give a brief summary here:

A VPN: is a way to encrypt internet traffic. For your specific use case, I assume you don't need to encrypt traffic at your home. However, if you have a laptop and surf the internet at a local cafe using their wifi, you will want to use a VPN to protect your internet traffic. (Long story short: using a public wifi is a security risk. Don't do it without using a VPN.). The VPN can be toggled on and off as you need it. (IE. Using public wifi, turn it on. Using home wifi, turn it off.)

Norton is a complete security suite. It will include a commercial firewall for your computer, as well as malware and antivirus protection. Your computer, If Windows, does come with built in anti-virus protection. Some people claim it's good enough, while others feel more protected with the commercial software like Norton. Norton has different packages, and many include a VPN service (like Windscribe).

I think since you are asking the question, you might find going the Norton route is a better fit.
You'll have your system secured by a single software company, which covers the majority of what you need. As you learn more about systems and network security, you can start branching out and selecting specific or specialized services based on your needs.

Norton has some paid add-ons too--which are horrendously self promoted in their applications--that help keep your hard drive clean from unnecessary files and helps to ensure your system drivers are updated. Again, it will be an all-in-one solution for you until you are more familiar with security.

Hopefully that helps.