When inside someone's close guard, keeping a good posture is a must.
As long as you keep a good posture, your opponent's doesn't have clear access to choke you. They need to break your posture in order to choke you.
Developing good posture skills is a necessary step of your Jiu Jitsu development. Pay attention to the positioning of your knees, alignment of your spine, weight distribution, and effectively using your arms as frames to control your posture.
If you want to find out more about training at DS Team in Auckland, New Zealand, visit https://www.dsteamjiujitsu.co.nz