Do Peak Master a few times every day in addition to your daily workout. In the beginning it might be easier to use songs for training sounds. Also you might find it helpful to use Practice Mode before starting training session.

EQ to me is more about feeling, and it's best to start with generalities...I've found it hard to explain because we steal most audio vocabulary from other senses (bright, muddy, air, dark, warm, etc)
To me too much around 250 sounds "chubby", too much around 800 sounds "nasal" or "honky". 2-4k is "brittle" or "Shrill" and above 6k it gets "closer" and "piercing" maybe.
Once you are able to build a few simple and broad guide posts for yourself you'll gradually and with practice start hearing the nuances inside the ranges themselves.

For me it's helpful to refer to the formant frequencies of human speech

You'll find them in chapter "Phonetics"
https://en.m.wikipedia.org/wiki/Formant

Just play EQ Cheetah incessantly. I got frustrated at it one day and just went at it for several hours. Eventually your brain learns, even if you don't. :-) Once you've progressed in EQ Cheetah, the other EQ games will seem a lot easier.

Thanks!

I think the major issue of the EQ games here - education wise - is that the resolution of the spectrum you can chose your answer from is too high. It is a better approach to limit this first to just a few options - a few certain frequencies - so those can imprint by repetition and so can be used as references. And then gradually introduce more and more until you see the woman in the red dress :)