Eh, it was from a while ago. Bold themes like this are great when you're still learning how to express through songwriting. Cringe is necessary for growth
multiband is just separating low/mid/high tones with a splitter +slopes + compression then controlling the levels with the compression ratios and feeding it back to a single channel with a merger.
you can do a cheap multi band without compressors and just feed the split bands into a minimixer rather than merger and manually controlling the levels there; though leveling the volume overall is harder with that method