Welcome. You will find a lot if great info and many knowledgeable vets here to help you out.
First, understand that their are side effects with all steroids. Some more than others, but, in consideration of their use, you must be prepared to experience, as well as prepared to counter, some side effects.
What exactly are you looking to gain from the use of drugs? What kind of athlete are you and what kind of training do you do? What are your stats? Are you subject to testing?