Bro, I aint going to lie. I started at 20. And it was the best thing for me, imho. And THATS ALL THAT FUCKING MATTERS, is your OWN opinion. Do all the research you can. Find out about protein intake, calorie intake, sleep, PROPER training tecniques, PROPER PCT(key) and the side effects of EACH compound you want to take. Take time to find other boards, which have huge steroid libraries with definitions of EACH compound. This is IMPORTANT. You want to know which drug will make you bulk, get stronger, make your dick limp, make you bald, good and bad, learn it.
Personally, im glad i got on. I trained for years, being in martial arts since the age of 12. But, for the life of me, no MATTER HOW MUCH I ATE AND TRAINED, i couldnt break 143 lbs. Many people call themselves hardgainers. But i sat down and calculated the ammount of money i spent on REAL food in one week. I spend 210 a WEEK on fucking food. Tell me im not a hardgainer and i will spit in your face. Anyways, after RESEARCHING alot, and even some flamming(oonly from this board), i learned all i needed to know and took the plunge. My first cycle took me from a starting 138 lbs and blasted me to 178 lbs, and only loosing 5 lbs due to a GOOD PCT. A good PCT=gains kept. My arms went from a 13" to 17.5" prolly close to 18 now.
Just read, read, eat, read,eat,eat and sleep. Then, and only then will you grow!
Happy growing
CNJ