Merlin can be sort of summed up by 'is told destiny, tries to forcibly change future, fucks things up a lot, tells a lot of lies 'to protect people', cries a lot because his life is terrible'.

But on the bright side he doesn't remember most of that at the moment so it's not so bad.

On the flip side, though, he's still a little skittish as a person and has sort of been denying he has any 'interesting powers' so to get him to admit it he'd need to feel safe or be caught out or something. It's doable, it'd just need planning!