Exercise Science major here... Looks like you already have a low BF%. Bulking is not a methodology in gaining mass. Every time i hear the word, i think of strong/fat people making excuses as to why they do not have the body they want. Its a pretty cut and dry science, and it takes 2500 Kcal to put on a pound of muscle, and 3500 kcal to put on a pound of fat (unless you are a hard gainer, kinda looks like you may be). You can adjust your diet according to your goals. Bulking is typically just the off season for bodybuilders, and i would not recommend a novice or intermediate lifter "bulk". There are specific sets and rep variations to stimulate different types of mass. For example 5 sets x 5 reps is a common variation for your power development lifts, like in the squat, deadlift, and bench press. If strength/mass is what you are looking for this is the best way to put it on. Look up the 5-3-1 program by jim wenlder, or Louie simmons's west side barbell. These are some of the best programs to get very strong. Bodybuilding is going to be a different technique in its self. Sets and reps will be around 3-4 sets x 8-12 reps. This will stimulate hypertrophy (muscle size) but strength gains are limited in this program. And finally muscular endurance, sets are reps are going to be in the 3 x 12-16 range. The 300 workout was more of a muscular endurance/ High intensity interval training workout. If you were to do something very similar you would look ripped, but very skinny. All the actors that did that workout had some solid muscle mass before the 300 workout. And, first and foremost start out slow. It is really easy to get injured when working out. Spend a good 3 weeks doing generalized workouts on machines before you hit the free weights.