Linux Mint 21 Release Brings Reviewer a Welcome Reunion
Computer hardware requirements for Linux Mint 21 have not changed. You need a fairly-modern computer because LM is not as lightweight on system resources as it used to be. That means a box with a 64-bit processor, at least 2 GB RAM, and 15 GB free space.
The Linux Mint website has a comprehensive installation guide should you need assistance installing Linux Mint 21. But that should be unlikely. The installation engine is well polished. Most of my computers run multiple partitions, which typically force manual interventions.
LM 21 installer did not stumble. It simply asked where to put the OS. The installer handled all the partitioning and adjustments in the background.