I am a bit of overweight guy and I don't know anything about lifting and fitness. I can't go for strength due to very weak joints. (no loaded squats) I would like to go for body building or hypertrophy training. Some pointers, tutorials and links to resources are welcome.
As equipment goes I only have resistance bands, a bicycle and an outdoor gym.
Also how important is a diet in keeping myself fit?
Not sure what will work for you, but I lost 40lbs by riding my bike 12 hours per week, and cutting processed sugar from my diet.
Now I've moved on to hypertrophy lifting with Caroline Girvan 5 days per week, and riding bike 6-8 hours per week. I've gained 5 lbs back, but its muscle and is fine.
Also, oatmeal with a fruit (either blueberries, strawberries, banana, or raspberries) in it every morning for breakfast