My suggestion is to spend maybe half an hour in the evening learninga new hobby/skill, then when you’re in bed go over what you learnt in that half hour in your mind to cement it. You’ll find that just running over the knowledge in your mind induces the “counting sheep” effect and will help you drift off to sleep.
If it doesn’t work, then at least you’ll learn a new skill much quicker!
Have you ever tried listening to hardcore history by Dan Carlin? I find he’s the right level of captivating to keep me interested, but slow enough that I can still drift off to sleep