Sharing more Excel formulas and files. Try to create small programs using some logic. Search for Excel-based programs on the internet and try to understand their logic. If the creator is a professional, they may have hidden the logic because the main component of any program is its logic. If you understand the logic, you will be able to create easily. If the logic is not protected, try to understand which formulas are used and how nested formulas work.
Another effective method is to use each formula repeatedly at least five times. This practice will help in understanding the formulas, and then you can try to loop one or more formulas.