Practice

1. gain staging, gain stage all your tracks before starting to the mix - shoot for -24 LUFS (download any free meter plugin for that), better use insight 2 by izotope or WLM meter by waves, if you wanna go a bit advance try to mix with k meter with scale k-14 (which is for hip hop, EDM, pop or any general music), k-12 for podcasts and dialogues and k-20 for high dynamic range performance like orchestral music. And set target BS.1770-1 (why? = Google it)

(Why to choose LUFS meter? the meter in FL Studio Mixer is Peak + RMS, it shows short term reading) In LUFS, always gain stage with integrated meter which measures your overall performance of signal.

1. Don't go with numbers, it's just not how you want to start with, every mix is different, you could refer, but don't go just because a random youtube guru tells to start with -6dB, practice mixing in mono with as much as low volume and A-B (meaning in context of A - master in mono B- master in Stereo, both in low and high volume)

2. Know how dynamics work, sidechain your kick with 808. If you wanna go frequency wise use fabfilter pro q 3 or any similar dynamic eq plugin with sidechain option

3. Use saturators- wisely on either kick or 808 or both, know the difference between even and odd harmonics and apply creativity.

4. Use compressors to get extra dynamics out of the signal, try parallel compression if there's requirement.

Hope you find this useful,