I need help writing guides and manuals

I have an IT service management platform which we need to create guides and manuals for. We have a template based on the previous IT service management platform so we just need to recreate what we already have based on the new interface eg if old system says how to create a DCS request you click the home page, select drop down but new system might be for example you search DCS request, click on and it will open the home page.

It’s stuff like this but also attaching screenshots replacements. The only caveat I can’t give login so will have to be done via zoom (screen share), I will then leave my laptop running so you can work on it. I think it will be a 2/3 hour job