I recommend Linux Mint. It’s based on Ubuntu with all the same benefits but without the drawbacks. Mint is lighter, faster and very stable. Looks visually similar to Windows and is more complete and ready for use than Ubuntu.
Ubuntu uses the Gnome desktop which is heavy on RAM and needs extensions to be really useful. Mint uses their own Cinnamon desktop and it’s highly optimised, full featured and ready to go.
It also automatically makes backups of your system incase anything goes wrong.