yeah when i try playing around with it it just feels like it makes a lot of different aspects of the song less clear

So i was tweaking with the MSEB and Im having trouble figuring out what sibilance LF and HF is and also what makes MSEB different from an equalizer? and if you wanna show me some good MSEB or equalizer configurations that would be great too.

New to audio and just tryna learn some crap