Chronic insomniac here. I struggle immensely falling asleep, though once I am there I can usually stay asleep for at least a few hours. I have gotten used to it and just consume inordinate amounts of coffee now/got used to operating on three hours. I stopped trying to push myself to get to bed earlier, because it makes me less likely to get any sleep at all.

There are a couple horror podcasts that help me semi-doze (I find horror very relaxing, which probably would give a therapist loads of material to work with) when I am on the bus or train. It isn’t a proper sleep but it gives me a bit of rest and can actually give me a few hours extra energy before I feel tired again. I get what sleep or sleep adjacent activities in when I can.

Scare You to Sleep is the one I recommend most often for that, the title alone should hint that it is geared towards exactly that.