I have a few things that help me. Smoking cannabis helps a ton. If that doesn't work, I use a sound mixer app called "sleep orbit" it has a bunch of different sounds that you can layer. It's like creating your own spell for your brain to be entranced. I also imagine my dreams in my head and listen to soothing music to get in the sleepy mood.

i’ve told other people this but try being active during the day, it doesn’t have to be something big and you could like maybe work out at home or walk around the house to get ur body tired