I started lifting for the first time in my life late October and have been hooked since. I've been doing deadlifts for about a month now, and I haven't really been gaining much. I'm 5-8, 150lbs and i'm doing 3 sets, 12 at 135, 8 at 185, and 4 at 245lbs. Should I increase my sets, reps or weight? Any advice would be great, i'm looking to be able to rep 3 45lb plates on each side by the end of May if i could. thanks