I completely agree with you Debbie. I actually worked in retail prior to becoming an admin. I stumbled into the administrative professional world. A friend knew I was trying to pick up extra cash and she recruited me to fill in for their admin who was going on maternity leave. The admin decided not to come back and I ended up staying on board. That was a little over 20 years ago. Like yourself, I have piecemealed my career over the years through trainings, contract work, and various jobs.
I just completed my certification this past Spring. I can honestly say, you will not regret it. You will learn a lot, you will confirm what you know and you will also gain confidence in your skill set. Enjoy the experience.