Learn English – Dreams come true or they are fulfilled. What about ‘hopes’

Aren't you simply giving him some background information?

Background: the circumstances and events surrounding or leading up to an event or occurrence.

First, I need to give you some background.

Oaf means someone who is clumsy and foolish, but doesn't say anything about intent or how others perceive the person. A lovable oaf is more specifically what you mean, but of course isn't a single word.

Come to think of it, buffoon is really close, but maybe a bit more insulting than your intent.