Basically, I am a 15 year old boy, 5f 11". I weight about 10st/140lb/63.5kg.
For the last month I have been exercising by just doing random push ups/sit ups throughout the day (roughly 100 push ups and 200 sit ups). I can do Sit Ups in groups of 40 and Push Ups in groups of 20-25. I know that just doing two different things isn't very effective, so I need an actual routine. The summer holidays are coming up for me (its my last day tomorrow) and in these 6 weeks I am wanting to spend more time on it.
So basically, what kind of routine should I be doing? I just want to increase my upper body strength. I can spend money on dumbbells etc (I want to buy dumbbells, but I'm really not sure what weights I should get, I was thinking 5kg or 10kg)
Also, what should I be eating? As I'm 14 I can't really control my diet, but I eat a lot (more than you would expect, I have a good metabolism though so I have virtually no body fat), and lately I never have anything sweet and I skip any puddings. I have always been more of a healthier person, always having my 5 a day in just fruit that I eat. My mum/dad cook healthy homemade meals.
I was planning on buying g-fuel (http://gfuel.com/). It's not a protein shake or anything, just a healthy energy drink basically which should help me if I take one drink every day before I workout.
Thanks for any help!