Nicely done. It will showcase you living art well.
I have found with my projects creating plans, other than the basic idea, is often wasted time for me as creating detailed drawings, schematics, etc. is not my strength. I prefer to start with my idea and usually perform a good amount of trial and error (make corrections/adjustments) as I go. So long as you are willing to back-up a few steps and redo things a few times, it is not a problem. You are right, this usually results in a lengthier project and there probably is a more waste in terms of materials. However, the satisfaction at the end is nice.
Cheers, Keith