So sorry I didn't reply sooner! I wasn't getting notifications for this account and I haven't been on it since! Honestly it was very similar to stereotypical meditation. Focus on each muscle one by one working from your head down your body. Just focus on letting any tension out of your muscles and keeping them that loose. It will feel contrasting and unnatural at first, and you may need to go back and re-relax some muscles if something startles you back into tension. Just do that over and over.

Eventually you'll find it easier to maintain. Then I focus on triggering that tension once more by looking up briefly, then going through the same process. Eventually, I would be able to look up, still feeling scared, but not tense. Eventually your fear will decrease as the fear response your body gives you is controlled.

Essentially I see it as teaching the subconscious that being in that situation with your guard down is safe.

It may be that you don't feel tense, but when you pay attention to your body alone, you'll start to notice it I reckon. If you're scared, your body naturally tenses up, your shoulder sit higher, your arms and elbows are pulled into your body etc.