Dual-booting your pc isn't an easy task but it's definitely not impossible. I recently dual-booted Windows with Linux on my pc and here are some tips:

• BACK UP YOUR DATA. Dual booting might end up erasing your existing operating system so it's necessary that you always carry a back-up.
• Get to know about the details of your pc and find a suitable tutorial.
• Google and Youtube are your best friends in case you get stuck anywhere :)
• Believe in yourself!