I was told by some trained system operators when I began to surf the Internet that whatever you do, nothing is private on the net. Basically if someone wants to find you and knows how then they will be able to track you even if you make it difficult for them. However though this may be a fact of life I think there are some useful things you can do to learn just how computers work without delving far into the arcane world of binary mathematics.
https://www.grc.com.
This site has been going longer than I have been surfing and comes with some useful online scans that are free and since they have been used by millions are safe and secure for all users. The scan will ask your computer to respond (Shield’s Up) and if it does then your firewall is not working adequately. Another scan will print on screen what your browser asked the site and you will see your IP and country and other information clearly visible. Another scan will check the Netbios and other deeper ports of access to find out if you are secure.
It doesn’t matter too much if these things scare you, these scans will either out your mind at rest or tell you how to better secure your surfing.