In Strength Training: Building strength/muscle

Dear escapist community. I'm a skinny dude, even though I weigh about 160 lbs. So, what do I do now? The most important thing is nutrition. I'm not going to pretend to be an expert on any sort of exercise, but there are plenty of great resources on the internet available for this. Best of luck! I've got a trashy diet. It's basically 3 big macs a day. How exactly do I create a decent diet for mysel ...Strength Training