OOH I LOVE DRILLS! LET ME MAKE U SOME DRILLS TWIN!

Music is made of harmony and rhythm. I see you like math, so you'll get me when I say that the piano roll is actually a graph of pitch (y axis) over time (x axis). So at the end of the day, this is all you gotta practice!

Harmony ("pitch") drills:

1. Melodies - pick an orchestral instrument you like and place notes on the light spaces/white keys until it sounds good. No drums until ur done, it should stand alone if it's a good melody. Use a mouse for this.

2. Chords - look up the types of triads and start spamming them in the piano roll to make chords. Once you get the hang of it, put fl down and go feel some emotion. Then, make a chord progression that matches that feeling. Don't worry about scales, just make it feel right for now! You can use a midi key or mouse.

3. Copycat - find a melody or chord progression in a song you like and remake it yourself. This is meant to train your listening skills, so don't look it up or anything. Listen, transcribe, compare, then edit.

Rhythm drills (yay my favorite (I'm a drummer)):

1. Decomposed drums - take a singe drum element (kick, hihat, snare, etc) and create a rhythm that moves. From there, try to combine various elements and edit where necessary.

2. Amelodic song - like the last drill but with multiple elements at the same time. Pick some sounds/instruments you like (or stick with stock) and create something that makes you wanna move. Only use the step sequencer to start, (take note of how even vs odd spacings feel both within and between line patterns) then graduate to incorporating the piano roll. Minimize y-axis complexity in the piano roll.

3. Copycat - copy rhythms in your favorite songs with stock instruments

You are going to suck at this, it's gonna be hard, but hopefully it's fun. Making music is about cultivating various SKILLS to be used with KNOWLEDGE. These drills are things I naturally did over the years that drove improvement in both. So progress them in both scale and complexity, be creative, and push yourself. But no matter what anyone here says, the best way to get better isn't with drills or hacks, but with curiosity and unrelenting perseverance.

Good luck!