IMHO....always always always take the time to do it right.
In the end...shortcuts can really waste your time...more so than the extra steps. You could end up with a purse you hate. Now THAT would be both a waste of the time you spent...and the money you invested.
Maybe NOW isn't the time to take on that particular purse. What if you set it aside...and just do it when you feel less pressure?
BTW...it is a darling bag!!! I saved the link! I like the look of East-West styles!
Let us know what you decide to do...and how the bag turned out.
I like your color choices better than the model, too.