For dual boot install Windows first, its easier that way. Windows install requires around 100GB (based on future needs). On Ubuntu 20GB is fine.

My recommendation:

1.) Get a 2TB Nvme. Divide the drive into 3 partitions. 100GB for Windows, 50GB for Ubuntu, rest for your personal files.

2.) Install windows first on 100GB partition

3.) Install Ubuntu using the advanced installation. Install Ubuntu to use 50GB partition (represented by / symbol), format rest of the space and make it your home partition under Ubuntu (represented by /home)

This way even if you somehow screw your Ubuntu installation your user files are safe on different partition.

If this is too complicated after installing windows just go for install Ubuntu side by side option in the installer.

If you wish I can share a solid article which you can use as a guide.

If you are gonna install Linux and want stability go for Ubuntu LTS in the guide. Another alternative is 23.10. Great driver support.

23.10 is vastly improved over LTS Ubuntu

Thanks, I am planning to buy FW13 and want to run Ubuntu 23.10.