If you've taken the FP&A Fundamentals Course, you would have heard me talk about Corporate Finance Institute (CFI).
As a summary, they teach advanced financial modeling in Excel as well as other finance concepts. I highly recommend them as a next step in building your technical skills.
They've compiled a very useful Excel keyboard shortcuts summary. Familiarize yourself with it, and you will begin building highly efficient Excel skills that will save you tons of time in your financial career.