Answer:
Basically:
Down in the dumps: sad, feeling 'down'
Keeping us in the dark: retaining or withholding information
Isn't all its crocked up to be: It isn't as good as it seemed to be
Poor company: dislikable or untrustworthy companions
Caught my eye: caught my attention
Take things easy: not to overwork yourself
Right up my street/alley: Within your skill/talent range
Off the beaten track: in or into an isolated place
Come down to earth with a bump: Coming back into reality and having to face a hard / dislikable truth.
In his element: within a place/situation he's comfortable with, suck as a skill or talent
The crack of dawn (im assuming): At the very beginning of the day when you first see the sun
I sincerely hope this helps! Idioms are wack