A financial model that answers: can I quit and go full-time?

I want to know if I can afford to quit my job and go full-time on my side business, and I am too scared and too disorganized to figure it out clearly. Build me a real financial model I can actually play with — a tool that opens right in my browser: my runway, what the business needs to earn to replace my salary, the different scenarios, best case, worst case, slow case, and the point where the math actually works. Let me move the numbers myself and watch the answer change as I do — my savings, my salary, what the business makes now, how fast it's growing. Pre-populate it with example numbers so it runs the moment I open it, then let me drop in my own. And give me the spreadsheet behind it too, so I can take the model with me and keep working the numbers on my own. Give me the honest picture so I can make this decision with my eyes open.