How to Accept Your Emotions When You Can’t?
I wouldn’t start there. That’s a tall order, and all that comes much later. We begin gradually. Start with noticing the sensations, just attending and describing, nothing more (though it’s a lot already).
What do you do with your emotions when someone says “sit with it”?
You need more specifics. Here are some of the sensations to notice. Just notice at first; no need to have some fancy interpretation just yet, or even name what the feeling is.