Go to https://www.microsoft.com/en-us/software-download/windows11
Download the file Windows11InstallationAssistant.exe
Run it … and wupti …. soon you have windows 11.
Update and harden your PC
Most new laptops is brand new but still shipped with Windows 10 but you might need to do the complicate check ad this add values (flags) to REGEDIT and this way declare it good to go for Win11.