Install VirtualBox or similar and setup Ubuntu in a VM. Try running that full screen for a while as an easy low-risk way to start kicking the tires.
On my work computer I still have Windows which I didn’t boot into for more than a year. It was my safenet during my windows -> linux switch for full time. If stuck with task - 5 minutes and I am back to Windows. Don’t recall actually using that capability, especially after I set up free testing Windows VM on Linux.
Good luck!