Recommendations for documenting a project

Hello everyone, I have finished a somewhat extensive project and my next step is to document it, do you have any recommendations that you can help me with? this would be the first time I do this so I want the result to be as professional as possible.

We have dedicated tool which is Task Capture. Unfortunately it’s usable if you are planning to develop an automation. But I think overall process and document look you could use for your documentation.
More details which can somehow help you are here: