Download VCV Rack (it's free and open source, and it has many digital models of real world modules) and start exploring the network of YouTube channels dedicated to analog synthesis. There's currently some kind of Cambrian explosion of small batch analog synth hardware happening, so there's never been a better time to learn. Be warned that the first time you open the app you will not be able to produce sound without help, but that's the same level of user friendliness you'll get from a real modular synth, so it will build character. :)