How does this email sound?

'Hi Robert, hope you're all well  I know we talked about my play one time when I came up to yours and don’t worry if you don’t think so or you're busy or whatever and I know Jen was saying the other day that it might be difficult with Tom to come, but it really is a silly, kiddie sort of show, in a small theatre and it's all just teenagers in it. Anyway don't worry if not but It’s really very casual and it’s not at all a pretentious sort of show! Bear in mind I have to ‘sing’ and they know I can’t sing to save my life so no-one’s taking it too seriously!'