Sweet Sixteen by Tesseract modular is great for this. It has 16 inputs & outputs and can output at the same time to CV, MIDI and i2C. You can also use it without any inputs just as a CV generator. However it doesn't have recording or something similar, it's just faderbank.

EDITED Today, 06:54

As NoSky already mentioned, if you're on strict budget then I'd swap Maths for Abacus which is significantly cheaper.

I'd also swap Koma VCA for Behringer Four Play (clone of Intellijel Quad VCA) and add some LFOs to provide modulation, attenuverter and some multiutility module with mixer and mult.

Behringer has Four LFO (clone of Xaoc Batumi) and Steps (clone of Mutable Instruments Stages). You can also load Qiemem's custom firmware to it which will allow you to control LFO polarity and frequency range though I don't recommend it if you're complete beginner. https://github.com/qiemem/eurorack/tree/v1.0.0/stages

There are clones of Mutable Instruments Links and Kinks which are great multi-utility modules. If you're in UK BeepBoopElectronics has lot of various utility modules. https://beepboopelectronics.co.uk/

https://beepboopelectronics.co.uk/product/passive-attenuator/

https://beepboopelectronics.co.uk/product/bonds-and-structures-links-clone-eurorack-buffered-mult-mixer/
https://beepboopelectronics.co.uk/product/2hppassivemult/

https://beepboopelectronics.co.uk/product/cuts-and-folds-kinks-clone-eurorack-utility-module/

I'm also not sure if you have some kind of mixer or audio interface but if not you'll need some output module to plug your headphones in. BeepBoopElectronics also has simple 2hp headphone output module.

https://beepboopelectronics.co.uk/product/2hp-headphones/