Using Multi button mouse( gaming) in better touch tool

I would like to use Multi button wired mouse (to reduce exposure to RF radiation)on a Mac(gaming Mouse) to access multiple gestures from the mouse without using modifier keys. Is this possible? And if so does someone have any experience which allows them to recommend a good Choice of a wired gaming mouse. Thank you

I use this mouse for my occasional gaming, chose it because of its USB C cable. Works great!! It has two "option" buttons on the left which I mapped to changing the desktop - and then, depending on the game, these keys trigger special keyboard keys thanks to BetterTouchTool, really smooth!

Do you have instructions on how to do this? I can't get it to work for only a specific app