When is a Good Age to Start Steroids?

I just turned 21, have about 4 years of lifting experience. I was thinking of starting a small cycle within the next 6 months. I’m currently 230 at about 13% body fat, 555 deadlift 495 squat and 365 bench. I know most men don’t stop growth 21-26. I was told from a few people not even to think of them until 26 or over. Wondering what your thoughts are if a small cycle will be “safe” at my age. Im 21 now and wouldn’t start until almost 22