start the ball rolling	begin a project or start an idea
put your feet up	take a break and relax
thrown in at the deep end	put in a new and difficult situation without any help
show sb the ropes	teach someone new how to do something correctly
rise to the challenge	try your best to do something difficult and be successful
the bottom line	the most impostatnt reason for something
have a lot on your plane	have a lot of work and responsibilites
start the ball rolling	zaczynać, dawać przyklad na dobry poczatek
put your feet up	odpoczywac
thrown in at the deep end	zostac rzuconym na gleboka wode
show sb the ropes	pouczac, wtajemniczac kogos
rise to the challenge	stawac na wysokosci zadania
the bottom line	sedno sprawy
have a lot on your plane	miec duzo pracy