I have had insomia from the day I was born, so am used to using music from teenage days with a radio. Unfortunately, there were no easy DC power units or recharable batteries so it cost a lot.
My list includes music by Enya, classical Spanish guitar, tune on the harp and some CDs from Mali and South Africa. In the last couple of years, I have listened to a lot of Podcasts. The next day, I can rewind to the last bit I remember and listen to the rest! I choose ones that have a quiet voice but information.
Friends sent me links to these 'whispering' podcasts 'ASMR'. Firstly, I can't hear what is being said and I need my mind to focus on something to distract from the fact that I am still awake! Secondly, someone telling me to go to sleep has not worked in 65 years, so it will not work now! The music ones seem to delberately have no tune or theme - one again that would allow my mind to wander over all the things it wanders over when I am NOT listening to music. Thus it cannot possible help.