If you do figure it out, try to find a vendor thst does escrow and not first exchange, bit harder to be scammed.

Don't be an idiot and use a fake name either, your postal carrier likey knows who is who and it's sus if John Smith starts getting packages randomly.

Thefunkycomitatus made very good points, you should mess around and install tales on a USB and try to mess around with it first. Also don't lose your crypto wallet, write it down on paper if you have to and destroy it when u're done