You recorded something. Maybe it is a full song, maybe it is a voice memo, maybe it is a track you built in your bedroom with a laptop and a cheap USB mic. You played it back and something was wrong — it sounded thin, muddy, harsh, small. It sounded like it had been recorded in a bedroom, which it had. Mix Your First Song is the field manual for the next step: taking a recording that exists and turning it into a mix that sounds like a piece of music instead of a phone demo. Written for the bedroom producer with limited gear and no formal training, it walks through what mixing actually is, the four tools every mix uses (balance, EQ, compression, space), how to set up a bedroom studio on a modest budget, why acoustic treatment matters more than plugins, the frequency spectrum and where each instrument lives, corrective versus tonal EQ and the sweep-and-destroy technique, compression settings for vocals, drums, and bass without over-compressing, reverb and delay for depth and space, panning and the stereo field, mixing drums and bass and vocals and supporting instruments, the reference-track method, why your mix sounds fine in the bedroom and terrible in the car, workflow and templates, mastering for streaming loudness targets, and a master checklist. Filled with worked examples, specific settings, and honest gear advice that assumes no prior experience, it is the book for the person who has made something and wants it to sound like it deserves to be heard.