One thing not mentioned in the comments here so far is that in general, almost all analog synthesis uses subtractive models. That's perfectly fine, but you should be aware that there are other synthesis models too. Frequency Modulation (FM) is one, famously used by the Yamaha DX-7. Additive synthesis is another, and rarely if ever found on actual analog synth equipment. There are a few more that were developed in the digital realm and will never (or likely never) appear in analog form.

There's a whole world to explore in subtractive synthesis, but you may find yourself at some point wanting to go outside that paradigm, and if so, it's easier to explore in the digital realm.