Heh, it looks like you should play through the First Officer level first. From the looks of it, you won't stand a chance in the upcoming missions, specifically in missions where the odds are against you.
Not to sound too harsh though.
Here's what I usually do when I fight good 'ol captain MacCray. If you haven't changed to quantums yet and are still on photons, fire them off and quickly change to the quantums. It's a simulation so you won't be losing any real quantums.
Note: I usually fire my torps at a distance of 30 or less. Even at 30, I change my spread to dual or quad to guarantee a hit. 20 is the best distance to fire your torps.
Anyways, I like to do things differently. I will constantly target his torpedoes since quantums are devastating. Do
your best to destroy all of his torpedoes. Once this is done, he'll probably remark on your
nice shot. Next, target his shield generator, warp core, or phasers. When he remarks that he has recorded
simulated hull breaches, then you're almost there.
Anyways, after this, the Klingons will come in. If you're looking for a quick win, which I always pick since I hate losing, I will target the Rankuf. Destroying the Rankuf will automatically end the mission in victory. If you target the other bird of prey, Draxon will simply say the captain is inexperienced whilst he resumes firing.
Anyways, hope this helps. Once you're done with this mission, you'll have even more fun in the nebula.