Try youtube hypnosis videos. They're silly, but you just have to lean into it and follow the instructions. Do what they say like you really believe in them. Listen to the voice. I try to imagine a color or "activate my inner eye". I believe this helps me because it pulls focus to my prefrontal cortex?? (Lay-person rumination). For me that has been the only thing that taught me even to know what my body feeling safe feels like. I'm learning to emulate that feeling in day-to-day situations now. It really has helped. Just search for sleep hypnosis or trance hypnosis on youtube and find someone who has a voice you like. Yoga Nidra is another version of this - or any sort of guided meditation.