There are many ways to learn to code these days. From coding bootcamps like Flatiron School to online courses to totally free beginner resources. The best way to learn to code depends on many factors, but the most important one is you. See what course is best for you.
1. Proprties of My Computer
2. Hardware Tab
3. Click on the device manager button
4. The expanded computer will list all devices.
If you do not see a network adapter here that means that there is no adapter installed and possibly not one in the computer. Or you could look for the RJ45 plug (Fat telephone-looking port) like sirbounty said.
Hope this helps
Lyle