Connect website to VBA based excel tool

I have an VBA based excel sheet, which I'd like to keep private (ie not have to send to clients, etc). However, I'd like for my clients to enter a few inputs on my website, and the inputs then be fed to the excel vba code (without the clients seeing the excel sheet or the code....I just want them to see the website). Then I'd like the outputs from the sheet to be shown on the website. How do I do this? Do I have to learn a new programming language, etc? I've been told by one party that I may need to learn javascript, and another that I should rebuild the excel sheet using cloud solutions. Which of these is correct, and if so, do you have any recommendations?