I can't answer most of your questions and know nothing about posting pictures.
I am sure others will give you valuable information on that.
Seems to me there is a sticky on how to do pictures in here somewhere.
But I can say that you can start a thread whenever you want to.
Like now, and we will enjoy following your progress.
Be as detailed as you want to.
Look at other build threads to get an idea of what others have done and then do what you want to.
I recommend the Kirkham skunkworks build as an excellent example of a very detailed build.
When you start posting, we will follow along with your project
