A new user at sophos intercept X.I need a guide.

I'm a new user at sophos intercept X, and I want to know what the intercept X is, what the environment is, and what you need to prepare for it. How is it deployed? If I'm not a user of sophos, can I use the intercept X software now? What devices are required to be used? How do you use it? Other supporting software is required. If I use the firewall of sophos, how does the intercept X perform the continuous heartbeat? Most importantly, what is the principle of the intercept X implementation function? The intercept X is locally available? Or the cloud? The deployment process? The last question is how the intercept X co-exists with third-party antivirus software, for example. Is there any documentation for the above question?

thank you!

sunny