Best way to ship from home?

[dougscats]

Thanks for all the replies.
I feel like a moron, but I'm still having problems.

First I went to the usps site, Click-N-Ship.
It appears that this service only applies to Priority Mail. Is that correct?
When I try to print a label for first class, which is how I want to send it, I just reach a dead end.
Is it possible to get labels printed and pay for first class shipping from home via usps?

Second, I went to paypal.
I just received money ppff for a card I sold to a forum member.
Following paypal instructions, I went to "Activity"; then I try to click on the transaction [which was simply a payment, no item mentioned], and it says,
We couldn't find any transactions matching your filters.

What am I doing wrong/What do I need to do?

Sorry for my ineptitude; thanks for any additional help.

Doug