Perhaps you could share with us, how you brought about being promoted on the basis that even yourself recognise you were not ready for it. Surely your certifications impressed your management even though you are yet to gain practical experience.
If you have gained certifications, then surely they would have provided with knowledge that you could apply. Is there a chance that you are being too modest? If not, then I would suggest that the courses were a waste of money.
Honestly, I was just doing my job. In the end, I think I was providing valuable feedback that lead to decisions that, over longer periods of time, proved to be valuable. So I was asked to collaborate more on technical decisions and providing design ideas.
I'm in a country that puts a lot emphasis on "formal education", so having the certifications is relatively important but I do believe they were, in part, a waste of money, due to how/what was actually taught.
ie., People who cannot get a required certification (eg., degree) are probably not very capable. AND by requiring a degree we make the profession harder to enter and therefore more lucrative.
Much of what is provided during most certification processes (high school to undergrad) isn't learnt, and that which is, isn't very useful.
They exist more as race tracks to measure athlete performance. The athelete isn't expected to remember or care about the race track, only finishing.
My experience was mixed. The foundation course was good, some advanced courses were excellent, while others were way too basic to be called "advanced" courses.