I have adopted a couple PowerAutomate flows from my predecessor and fixed them, now I need to create a new one based on these...and don't know where to start.
I have created a flow map,

and already have a sharepoint table that has projects listed and know I need to create another list for subcontractors and their data.
I don't really know how to start, beyond creating a gallery and allowing the user to select an item to fill some fields.
1. Which field type do i use to type in a project# or project name so it can be selected?
2. Once selected, I can populate existing fields, but how do I create a [handsome] pdf and a separate email with the information in it that gets sent to various people?
3. What control can be used to look at the value in a field, and determine 1 or 4 different routes to be sent down. This is a determination by Project# , where if it begins with 1, it goes to a certain person, if 9 another, if jv another, and if anything else, it should go to admin because there's a mistake.
4. In our other app, we have tabs and the information collected in all tabs gets populated in the emails it sends. I was planning on starting with a copy of this and changing the fields, content, etc. to maintain consitency. Any issue with that approach?

Thanks for any help you can give.