Whenever you endeavor to complete a task for the first time you will learn a lot of things. This is good. You become a better painter, writer, programer.
A willingness to do the task to the best of your abilities is essential. Not make excuses and say “it’s good enough…”
Not learning the nuance of the aspect ratio of a given projector as it relates to the picture you are projecting will result in a projection that does not reflect the original aspect ratio. Hence my first image transfer using my laptop and a projector resulted in squashed figures due to the incorrect aspect ratio of the projector. (They were about an inch too short, relative to their width.) I only discovered this after inking the entire image.
So now I must re-transfer the portrait group to the canvas. I will use a xerox and transfer paper.
Before I do this I have to coverup the original transfer. I used titanium white for it’s opaqueness a little walnut oil alkyd to help dry the paint.