Honestly, every time I interact with the USPS today, I get it wrong. When I fill out a Registered Mail form and present it to the clerk, it's wrong, they ask w

Honestly, every time I interact with the USPS today, I get it wrong. When I fill out a Registered Mail form and present it to the clerk, it's wrong, they ask what I really want, I get confused. When I'm sending a package, something is wrong and the clerk is schooling me on their regulations. I told them I should "Click'n'Ship" more. I grok RFC822 inside and out, but a simple letter? My father does great at these things. Never taught me.