There is currently a trend with modular music. I am seeing this as a opportunity to make music by my own and learn more about analog design but also how to make a well finished product. The main components to start with a modular synth are a VCO (Voltage controlled oscillator) , a VCF (Voltage controlled Filter), a VCA (Voltage controlled Amplifier) and a sequencer. There is a lot of great content on Youtube and internet, i mainly looked at lookmumnocomputer or Moritz Klein channel at first, then went deeper with littlescale, Polykit.
But Let's start with simple things :