1) Read the FAQ here;
2) Read the D&S FAQ;
3) Re-read both 5 more times
Why do I say this? You state that you don't want to "screw up your weight" and yet you want to "bulk." These two goals are not compatible. Either you want to gain weight or you want your weight to stay the same.
This is not a bodybuilding site. If you want to gain weight, eat a lot of clean food and lift heavy compound movements - likes squats, deadlifts, powercleans, press and the bench press. I don't see the point of stuffing your pie hole with shit so you can get fat and then try to lose the weight. Most likely - you will lose most of the muscle you gain eating pizza, fries and ice-cream. You will back where you started after wasting a bunch of time and energy.
If you are concerned with improving athletic performance or building strength, after some basic research, you will realize your question is misguided (i.e, fucking stupid).
If you are really concerned with looking "cut," go to BB.com and you will get better advice. My guess is that they will basically tell you to eat lots of clean food and lift hard.
Best of luck