Did you have anyone test for your goals her before you purchased her? Most dogs that are for 'sport' are confident right out of the box and don't need to settle to take treats or tug. You do have to take it slowly, IMO and maybe utilize some of the two week shutdown exercises
to help her settle in.
Are you in a club yet? If so, there should be people that can help you evaluate her and help you with any issues she may have.