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I suggest a few additions to get more "melody".
Add a sequencer, a sampler and a keyboard.

I'm not big on recommending specific modules or solutions. You may get your hands on a sequencer that you find intuitive and simple to use and I find it clumsy and awkward. Do you already have or used something that works? You may like a sampler/sequencer integrated in one product. There are many solutions.

Personally I prefer an onboard eurorack module sequencer, external sampler and keyboard.

These search terms will send you down a rabbit hole of options.

eurorack sequencer
hardware sequencer
sampler sequencer
sampler sequencer hardware
midi keyboard
usb keyboard controller