Just play around with audio tools, so you can get to throw ideas at a thing and get results that you can hear?
The things you can hear scale pretty well all the way down to DC, and all the way up to daylight (or beyond, I suppose).
After spending a few (or dozens, or hundreds) of hours tinkering with audio-range frequencies for fun, then maybe you'll have a real place with which to associate the maths that are involved in electronics and programming, and having that place might make that math (and whatever is needed to accomplish it) feel lot more worthwhile to actually-learn.
> might make that math (and whatever is needed to accomplish it) feel lot more worthwhile to actually-learn.
I agree. Start with small hobby projects using what you already know.
They should be things where you get immediate feedback, like graphics or sound. That makes them very fun to work and iterate on. It's addicting when you see/hear the output, make a change in a few seconds, and immediately see/hear the results of your change. That's the stuff that keeps you up all night at the computer.
You'll start hitting barriers where you need more math to get better results. Then you'll be much more motivated to start learning, and it will be easier to retain the knowledge when you actually use it in practice.
For instance, use Python to output audio samples. Start with simple sine wave tones, colored noise, and work your way up to implementing simple FIR and IIR filters to modify input audio like voice and music. Use Audacity to see the change between input and output as a spectrogram.
If you're into music, use an existing Python library to read MIDI files with songs you like. Generate audio output files for those songs. First with just sine waves for the notes, then you can start emulating digital and analog synths. Write code that takes sampled audio files and emulate different guitar sound effect pedals or tube amplifiers.
The things you can hear scale pretty well all the way down to DC, and all the way up to daylight (or beyond, I suppose).
After spending a few (or dozens, or hundreds) of hours tinkering with audio-range frequencies for fun, then maybe you'll have a real place with which to associate the maths that are involved in electronics and programming, and having that place might make that math (and whatever is needed to accomplish it) feel lot more worthwhile to actually-learn.