Ahh…I assumed you’d updated from an earlier Windows. Not sure if there is much advantage in clean install over a reset for you if W10 is the only operating system that has ever been on this computer.
For reference though, you just use the Microsoft media creation tool (which you can find online) to download the installer to a USB drive and use this drive to boot the computer and format the internal drive and install Windows. you would lose everything that is on your hard drive so backup any data.
As long as the hardware is basically unchanged then the license is already tied to your computer. there’s plenty of full instructions online should you need to do this.