Typically, time on steroids should equal time off. So if you run a 10 week cycle, you should wait ATLEAST 10 weeks before your next cycle once you come off.
This is the absolute MOST anyone who cycles on and off steroids should be using them, not the “normal amount”. Many guys run 1-2 cycles a year, with one cycle a year being a healthy normal approach.
A dosage like that can greatly harm your natural test levels, or not harm them at all depending on your PCT. I am not the guy to ask about PCT’s because i’m on test for life, but ask around and someone will help you!
300-500mg test for 10-12 weeks is a great beginners cycle!
You will probably want to run 10mg nolva per day on a cycle like this to be safe from estrogen issues, 10mg nolva wont hurt gains at all unlike things like arimidex or letro. goodluck brother