I understand how you may feel reluctant to allow an external advisor to delve into the detail of your business. I have had other clients who felt the same way. But all of my other clients found the investment they made was repaid many times over both in their business and their own work life balance. To help you we have produced a free spreadsheet which will allow you to reflect on what you would like to achieve with your business and where you are at present. If you use the spreadsheet it will help you to identify if it would be beneficial to get an external advisor or if you are proceeding in the direction you want. Once you have completed the spreadsheet we will review the results with you if you want at no cost to you.
Overall most people tend to learn better this way rather than trying to learn all Excel formulas at the same time as this can be very confusing. Most of us tend to learn in smaller packages of information and you should look for a course of instruction that will allow you to do this. As you are learning to use Excel you should of course start by learning to use the formulas that you are actually using or are likely to have need of in the immediate future.