Starting rental properties

[Jacques Edouard Dessejour Lapierre]

I am thinking of starting my rental property, my very first but I am wondering what happens when you buy a house turn it into a rental and go for the first 2-3 months after acquisition without ever finding a tenant while you still are having mortgage payments. I say this because I will still be renting I am just looking to find passive income.

What to do now?