Advice with night night/partial hanging?

[yellowroses]

I have this strap that's meant for securing a trail cam to a tree, made of sturdy fabric and with a little thing that easily clicks into place to hold it securely tightened. I've been fucking around with it trying to do the night-night method all morning, can't seem to get it tight enough no matter how hard I pull. I have a lot of fat in my neck so maybe that isn't helping? I also tried putting two lighters over my carotid veins but again, couldn't get it tight enough (it was tight enough that if I put even the slightest extra pressure I was starting to black out though)

The tightest I could get it, with the lighters, I was only slightly seeing stars after a few minutes.

Any tips on how I can make this work? Either with the night-night method or partial hanging? I don't have any other methods available as my house has been mostly suicide-proofed after my last attempt.

Thanks!