I hope this post can provide some value to people who want to start building their own pc. Installing windows should be straight forward but it sounds more intimidating to those who has never done it than it actually is. These are the general steps into installing windows 10 on a freshly built pc.
Purchase a Windows Activation Key (I prefer Kinguin because you can't beat the price)
Aquire a USB Drive (at least 4GB, 8GB is recommended)
Download Windows 10 from Microsoft and using their media creator tool to load it on the flash drive
Boot up your computer and get into the BIOS and plug in your USB Drive that has the windows OS on it. Go to Settings>Boot>Boot Option 1> Select your USB Drive
Follow the OS installation on screen instruction and enter the activation key you bought and you should be good to go
It's recommended that you do check for updates for your motherboard and graphics card to make sure you have the most recent software installed. Just so you don't run into any compatibility issues.