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Hey industriousliv, thanks for your comment! Yes, it's kind of a life changing switch. Most Linux distributions also allow us to use machines that are 10 or 15 years old, without a glitch. I'd suggest you find an old (second hand) pc and install only "Linux Mint" on it, as choosing "dual boot" (having Windows & Linux on the same pc) often makes users come back to Windows for many tasks, due to their habits.

For sure!

In the case of Linux Mint 21, its minimum specs are:

2 GB of RAM (4 GB recommended for comfortable usage)
20 GB of disk space (100 GB recommended)
1024×768 resolution
64-bit CPU (single core) with 2 GHz speed or better

If that laptop has a 64-bit CPU, you're good to go! If it's a 32-bit one, you'll have to stick with Mint 19.3, or - preferably - look for a lighter distribution (there are several of them).