What is a good free excel training that I can find online? (For an accountant)

A vibrant community of Excel enthusiasts. Get expert tips, ask questions, and share your love for all things Excel. Elevate your spreadsheet skills with us! I am a long time excel user but I haven’t used it a lot in recent years and I never was the best. For example, I can create only the most basic of pivot tables, not to mention formulas (which I know many but have to relearn all the good ones whenever I need them). I saw this big pivot table that was put together by my job the other day and thought if they ever asked me to do one of these things I’ll be screwed lol. I consider myself to be an above average user of computer software in general, just need to upgrade my excel skills significantly. I want to find a straight forward excel training that isn’t too long but can keep me fresh, or even a longer one that will really help me be an advanced user, or both. Any suggestions are greatly appreciated!!! Suggestions for other software or skill sets that would be beneficial in the accounting arena are also welcome! I work in accounting consulting, primarily in the tech industry. I have some quick books online and Microsoft dynamics 365 experience, but have no practical experience in net suite/sage intacct/sap.