What does the phrase 'I'm feeling a bit knackered' mean in the email?

In the phrase from the post, 'I'm over the moon about my new job', what is the person expressing?

In a friend's message, they wrote, 'I'm absolutely gutted about the news'. What is the emotion they are conveying?

What does the expression 'I'm skint until payday' imply in the context of a personal email?

If a friend writes 'Let's grab a cuppa' in a post, what are they suggesting?

In the message 'I'm chuffed to bits about your news!', what is the sender's reaction?

In the email, 'I'm not keen on going out tonight', what does 'not keen on' mean?

In the post, 'I was gobsmacked by the surprise party!', what does 'gobsmacked' convey?

What does the phrase 'I have the munchies again' imply in a friend's email?