Making digital music requires a 'DAW' Digital Audio Workstation software, some headphones, a MIDI piano keyboard, microphones and an audio interface to record. Some learning materials and endless practice. When starting out most people are musician, songwriters & producers not mixers.

What is MIDI? MIDI stands for Musical Interface Digital Instrument. Take a audio cable that doesn't transport an audio waveform but instead transports digitally which piano keyboard key is pressed, pitch, how hard the key was hit, pressure and how long it was held down for, after touch, and you can map that keyboard to piano instrument sounds, bass guitar, organ, drums or any virtual instrument.

Bitwig [Software Win, mac, Linux] ($$$) Resources
Bitwig is the second to newest DAW. They have promised collaboration, first via local network then over internet. V5.0+ & still none.
Computer Music magazine in their August 2024 issue are giving Bitwig 8-track away free via an easy questionnaire.
How: LibbyApp FREE emagazines - Libby CM August (Bitwig) 2024 issue
CM emagazine bundled via Apple News+ subscription
[pdf] ZINIO CM mag 3.92 Pounds
Computer Music Magazine Subscription
[pdf] Beat Magazine April 2024 US$6

When recording set gain as high as possible while maintaining between -6 to -12db headroom and never clip at 0db on the meters.

Room acoustic treatment and sound proofing are two separate issues.

Shure SM58, Dynamic (CHEAP) - supercardiod good when no sound proofing. Pro studios use this mic.

Lauten Audio LS-208, large diaphragm condenser - noise reduction for when no sound proofing.