If you are new to Linux or moving to Linux to rescue / save a now defunct Windows 10 PC. Linux comes in many 'flavors', some very much like Windows, some not. If you choose something like Ubuntu or Mint ..., the install is relatively easy (back up all of your data on an external drive first please), will work even on the oldest system. I have Mint running smoothly on a 17 year old Dell Laptop, and my mainstay workstation is 10 years old.
You will notice some key differences such as different command structures (just takes some practice or a few tutorials), and a different way of updating. In Linux, since it is Open Source, you should get into the practice of checking daily to see if any packages have been updated.
I use (from the command line):
sudo apt update && sudo apt upgrade
daily to make sure everything is current. It will ask for your password
then
sudo apt autoremove
to clean up any redundancies.
Experiment, break things have fun, ask