If you are just getting started, I'd recommend focusing on strength first. Do lots of multi-joint movements (i.e. bench, squats, military press). You have a unique advantage right now though -- hook up with someone who can teach you *really* good form now, and try like crazy to stick with that form. Given that you stick to good form, enjoy that early ramp-up where you get stronger relatively fast. Later on you'll start hitting plateaus -- so enjoy your early experiences now.
Then... once your numbers are up and you begin to stabilize, you can start playing with your ratio of body fat and strength. When you cut your calories back you will probably lose some strength, and the trade-off varies from person-to-person. Over time, you'll understand your own trade-offs better and may want to vary routines and diet in cycles. For example, eat big and do heavier sets/lower reps for 6 weeks, then back-off your calories some and try to hold-on to your lifting numbers (realizing that they may slide... and that's when you have to stick to your guns and drop weight insead of cheating on the lifts with bad form).
I have to balance strength and look myself. I want to put up decent numbers in the weight room, but I have to also be ready to look "normal" in a business suit at the drop of a hat. My lifting patterns normally run in 6 week cycles, ranging from super-high volume "get pretty" routines down to super low-volume "get nasty" routines.