Can Taking Steroids For Weight Gain Be Safe?

Hi, I'm a 26 year old male, 6ft2" tall with a slim build. I wan to gain more size and fill out better in my clothes hence after much deliberation I hae decided to follow a 6 week steroid course. I would like to know what is the recommended dosage for this steroid which will give me the best results, also can you please name any side effects of these drugs:drugs in question: Decanoate and Sustannon