What should I do?

[retired_centrus]

I am 15 years old, 5'7 and weigh around 120 (which imo, is pretty skinny for that height and age). I plan on getting larger pecs, biceps, and developing a 6 pack. All i have are dumbells at home and i cant afford to go to the gym. Please give me some tips to work out!

 

[vitaf]

The main advice here is: do not spend too much time to workout small muscles, biceps, triceps etc.

If you want to gain mass and strength, and look athletic, you should make some basic exercises and make some repetitions with maximum weight. In this way your body will produce more testosterone and your muscle will grow without any other help.