Hi Madeline,
Discoveries is incredibly flexible in how you implement. For suggestions and ideas on implementation, I would start with the different options in the Curriculum Guide Intended Options and be sure to scroll down to the pacing suggestions. I agree with the tip that the second chapter in most units can be skipped if pressed for time. You can also search the forum for suggestions as well. Here is a recent post with some good suggestions. Hope these ideas help get you started.
~Michelle