Ok mate, heres the simplest thing to calm your body physically.

Breath in through your nose, out through your mouth. Normally, deliberately. Gonna puke? Same thing will stop you puking. Panicing about public speaking? See above.

Next, when it comes to learning to talk to ladies, or any human strangers, You have to practice.

Start small. Talk to the cashier about literally anything, what you bought, the weather, literally anything. Work your way up to a simple, “hows your day?”

Got that mastered?

Now talk to the old lady on your bus stop, she’s got scary female chromosomes just like the girl youre crushing on.

Practice makes perfect and conversation is an art.

Youre not painting the Mono Lisa tomorrow, but you can color by numbers with the cashier at the grocery store.

I’ve used Signal since it first came out as TextSecure like 10+ years ago.

It doesnt have fancy bells or whistles, but its work well for me and good enough that ive gotten elderly family members to use it too