I think even the less PC specialist can use KeyRemapper without a tutorial. All you need is the official link :
- https://atnsoft.com/downloads/keyremapper_setup.exe
And then install it, choose your language and follow the instructions. Basically, you need to double-click where its written, and then press the key or mouse button to change, then press the key or mouse button to replace it. Once it's done, you can also specify a game or program to be the only one affected by this change, which is very useful of course.