Where do you start?

The best place would be to understand 3 important concepts:

• What is Window?
• What is Start button?
• What is Desktop?

We can now proceed deeper into Windows and see how the rest of the components fall in place:

• Programs
• Files
• Folders
• Shortcuts
• Searching

If you're comftable with all of the concepts that we've discussed so far then congradulations and you're ready to explore intermediate computer operations.