Re: What to do when?!?!
Early on in your CF.com experience, there isn't much need to have dedicated strength days...they're programmed in there anyway, and you'll make strength gains simply by doing the metcons regularly.
Scale your workouts appropriately, and gut it out for about 4-6 weeks (this is about the amount of time I've found it takes someone to adjust to the program). Stick with Puppies or Buttercups
If strength and/or power are your main goals, you can switch to something like CFFB after you've been at it for a while.