Gyno is not going to happen on Test C only cycle if you are managing estro properly. Just go 12 weeks and go read some more on 1st cycles to understand why you need HCG and an AI. You need BOTH on cycle. Not just "on hand".Here’s what you do. Go to 8 weeks see how you feel or if you’ve developed any sides gyno etc. If all good, go to 10. If all good go to 12 then end your cycle
Get bloodwork at week 6 to ensure you're properly controlling estrogen with your AI. If it gets too high you will hinder your gains on cycle.