Im a newbie to PnuGP

Hello to all,

i’m new to PnuGP, recently i have created a key pair.

my question is how do i use it? how do i proceed from there?

i use yahoo email. how do i use it to securely sent email.

where and how do i see my public key and how do i post it on the internet.

is fingerprint the same with public key?

how do i sign a key pair?

pls. help me. im new and hardly dont understant how to start.