Well....30 gb is minimum for OS & programs that I want. Debian WILL install w/ only 1 gb free space. You could have a dual boot system - choose Windoze or Linux from boot loader. I've had errors with that and don't trust it for important stuff. Is this a laptop w/ only 1 HDD slot?
30 gb minimum Hard Disk Drive space for Operating System. I put the OS on it's own Solid State Drive - much faster than older platter-wand mechanical HDDs. Installation USB stick - probably fit on 1 gb stick. 120gb SSDs are ~$15 these days.
I'm trying a new to me Linux - Debian 12.8 w/ XFCE. Faster & more stable than Ubuntu 24.04.1 (Ubuntu is based on Debian). The distro might not have all the pkgs you need but fairly easy to find/install. Eg: I had to add 2 pkgs to mount my Moto Edge phone for file transfer.