Mitch from TheAudioDabbler did an excellent tutorial on understanding modulation sources and how they can dramatically affect your sound. He uses Zeeon and Factory to demonstrate these concepts.
In this video. I go over basic modulation using Envelopes and LFOs. I attempt to explain what each of them do and how they can be utilized in creating different synth patching.
Patreon Link(if your into that sort of thing)