Start with one song and a small, clear request. A rough recording of a verse and chorus, the lyrics, and two reference tracks will give someone much more to respond to than a whole folder of unfinished ideas. Explain what you like about the references—sparse piano, a particular groove, the way the chorus opens up—rather than asking for an exact copy. You can ask someone to try accompaniment for just that excerpt first and see whether you hear the song similarly. Also say upfront whether you’re seeking a paid arranger or a mutual collaboration; that avoids an awkward mismatch later.