Convert Excel Into a more sofisticared Invoice system

Hello I'm attaching an excel sheet that I use for my wholesale business, the main idea is to convert this excel in to a better application because at the moment is too basic Here are the steps I use: Add a new Customer to the Customer Sheet Create an Invoice in The Invoice -Main Sheet Invoice Details (Is where I add products to the order ) under Invoice Detail Sheet Once all previews process are completed, I go to the Invoice Sheet to send the invoice to the buyer I also have a sheet called Profit and Saving where io get the profit i make from sales and take 10% to be saved as my own savings Now what I will like to do: 1 - I will like excel to work as a program not as a sheet (Like QuickBooks or Quicken ) 2 - When I open the program I need to have bottoms like, create an invoice, create an estimate, add a new customer, Create a Packing List (I forgot to mention this sheet called Packing List, is the one used when i ship out the product, it will go in the box without prices, is only to warranty the quantity inside) The current packing list does not have the Brand Name, I will like to include the brand name like in the invoice sheet but without prices. 3- I need to generate reports like in the Profit Sheet, to get the same information Note: As you see in my sheet invoice details, I have a Status column where I mark the status of that specific product like OutStock, Ordered, Shipped, and so on. The same goes for the Invoice - Main where I have a status like En despacho, Processing, shipped, and so on I will not need to have inventory, the database will be only to store customer information and order, the same way it looks in excel now Please let me know if you have any question Thank you