I personally have no problems becoming independent as Sweden, my problem has always been the 20-30 years that followed.
Even when I mothball or destroy most of my forts, I'm struggling to make any sort of economy going, meaning that after the first war where I'm picking up the last pieces of a dying Novgorod, unless it goes perfectly smooth I'm typically wardec'd by Denmark wanting revenge, who either wrecks me or wrecks my finances forcing me to bankrupt right after.
I'm guessing that I'm jumping the gun too early, any advice on prepwork that I should be doing to make sure I can stand tall after I'm free?