One of the great times in my career was when I was hired to complete a difficult task that took months and months of planning and building and testing. It was an automated financial system that needed a very thorough database to be built , and built correctly. When at last the product was rolled out and signed off on, I learned that I could solve for things I did not ever imagine. On top of that, others in the company had told me that another employee who had left said that this project could not be done. Nobody was supposed to mention that to me when I was brought on board so that I could think independently. It really felt good in the end.
Always good to build some confidence in yourself. Congrats