very important is the choice of distro.. i am using archlinux and nixos, but those are quite hard for newcommers... I would recommend kde neon to start with: https://neon.kde.org/download

take the user edition.

You can use https://apps.kde.org/isoimagewriter/ to burn it to USB drive (larger than the iso).

!! Warning - the usb flashdrive will be formated !!

backup all your files from windows, as you will wipe the laptop clean, then reboot and keep pressing F12 to get to the boot menu.

select the flash drive and boot the live linux from the USB. Install using the installer after the bootup.

That should be it for the start 🙂