I think it helps to get to know yourself, for grounding, too: like I finally realized I can't visualize (though visualizing is a flash, not a picture, actually, by definition- I didn't know that either), and I have very reduced feeling in my hands and feet (so that doesn't work well. But that's ok). But what I see, or hear, or tactiley can hold, and ways to reduce fear or adrenaline (whether it's touch, what I read, or some physical expenditure, or distraction) helps, along with awareness of my thoughts, and gratitude alongside every fear or need.
Welcome to you. :)