Help with cycle

Hi I need some advice on a few things please.

1, I have been taking Test e300 for 16 weeks taking 300mg per week split into two doses.

i was told it was okay to stay on it full time but have since heard it’s best to cycle but I’m not sure how, do i simply stop and the following week do a Pct or do I need to wait some time after stoping to then do a pct?

2, with pct whats best to take and how long do I need to do this? Also if I want to start a new cycle how long after pct do I need to wait before restarting test e300 again?

3, to add more question I’ve also heard it’s good to add Masteron to my next cycle with the test e, I just wanted to check that it’s good to take both and one doesn’t interfere with the other as I’ve never tried it before.

I assume test e300, 300mg a week and Masteron e200, 200mg a week is okay?

thanks for any help you can give.