First of all: How did you get Windows onto your computer??
By using: MediaCreationTool2004.exe to download Windows 10-installation to your USB-stick?
If not! Do so! Then you boot your computer (via bootmenu) from that USB-stick..
If you need any help in installing Windows 10 correctly, Please visit: https://WinGuider.se/en/ for proper help From before the installation starts (you get help to turn your USB-stick into a universal installation media, (no matter if you have an older BIOS-based computer or a new UEFI-based computer, an INTEL OR AN AMD computer) and ALL THE WAY UNTILL just about everything is completely ready, with updates, driver-installs, etcetera.. I HIGHLY RECOMMEND IT!!!