Just thinking about relaxing is still thinking. So try building a simple, doable rhythm of down-regulating for several hours with soothing bath/shower, soothing music, simple slow stretches, lotions such as lavender known for calming, which will become a trigger to relax as you build a nightly routine. I use simple mindfulness - Metta/Loving-kindness prayer, breathing slowly, laying on my side, because that position allows me to feel my breathing most clearly, — with just a few phrases, my mind is usually quiet and clear, and I often fall asleep in the middle of the process.
I had difficulty with distraction during meditation until a professor friend suggested pairing it with slow movement - yoga, stretches. That was key for me. Perhaps blending touch, smell, sound, movement, and the anticipation of all of that, may be helpful for you.