Do this. Take it easy the first week, your musscles will be sore eitherway. But after a while your musscles will get used to the routine. Go 3-4 times in a week and start doing like 5x 12 exercises on a machine (i do this but add more weight every round). Lose the fast-food and the sugary drinks. Eat brown bread, red meat, chicken breast, fish (tuna & salmon recommended), fruit and rice + pastas, water and milk for drinks. Devide those into 6 meals. (For example eat a slice of brown bread with salmon at 8, a slice of brown bread with tuna at 10 and so on.)