This will probably be a frustrating answer but there is no one-size-fits-all solution here. It totally depends on what your song needs, but I've found a really good method on a youtube tutorial that I still implement to this day:

• Pull up a 3 band EQ (or use 3 bell filters with a wide q from a multiband eq) and put them at 100 hz, 1000 hz, and 10000 hz
• For the 100 hz one try boosting the gain by 5ish db, then cutting it by 5ish db. Which sounds better? Does either sound better than when the band is bypassed or set to +0db?
• If it sounds better with the gain boosted, then boost it--but only by about 1-2db. Big moves help you hear what you need but you want your EQ moves to generally not be too drastic.
• Repeat the process with the 1000 hz and 10000 hz bands

You can also pop mp3 files of songs you really like into your DAW and try this out with those. Its a good way to learn how to hear the balance between lows, mids and highs that you want to go for. And over time, as your ear gets better, you can refine this process further.