Do you have a tape loop or processor loop? That’s the best way to have optional use of something, compare the changes. You need to keep the volume equal for comparison, perhaps a piece of tape with pencil marks.
Then I would start with an inexpensive multi-band eq, ascertain the changes that you prefer, that will give you info, then, move to a ’better’ unit???
I just recommended this inexpensive unit from Amazon, you can try it, learn something, keep or return it
BTW, years ago, I learned, it is a mistake to seek 'ruler flat' with an equalizer, just mess with it until you start learning what sounds to your liking, then work hard at refining those particular changes.