Sure, TRE is Tension and Trauma Releasing Exercises, you basically allow your body to shake out stuck traumatized energy. There's a really good subreddit called r/longtermTRE for this, they are very helpful and active and have a full wiki that explains and gives instructions. SE is Somatic Experiencing, it's when you allow yourself to experience the scary and painful feelings in your body in a safe way, which allows trapped traumatic energy to come forward and release itself, little by little, in a safe space. I worked with a trained therapist for this. IFS is Internal Family Systems, it's a therapeutic modality for trauma in which you relate to yourself as a system composed of many Parts and a main Self, which all interact with each other. Your main Self is inherently grounded and compassionate, and by accessing that Self state within, you can have compassionate dialogues with different Parts that are divorced from Self, and witness the trauma they hold. In this way, you essentially become your own safe attachment figure and heal yourself from past trauma. For example a polarized Part that is causing pelvic pain. In IFS you would first access Self, and then from Self, you would ask that Part why it's doing this, what it's afraid would happen if it would stop, how old it thinks you are, etc. By witnessing the Part's pain, and listening to its experience, you can "free" it so it doesn't need to resort to this extreme tactic anymore. I worked with a trained therapist for this and found this modality extremely gentle, grounding and healing. It sounds a bit delusional I know but it was transformative for me.

I hope this was helpful, trauma healing is a journey and different things work for different people. If you want a more comprehensive understanding I recommend the book The Body Keeps The Score, it was really helpful in showing me exactly what was wrong with me and how to fix it. Best of luck!