What does " you gotta start somewhere" mean? When do I use it?

Question

Answer

Hey :)
It's a colloquial expression meaning that, in order to do anything, you always have to make that first move, whatever it may be; you can't just use shortcuts.

Example:
"I want to become a photographer, but I don't know how,  so many things I don't know"
"Well, maybe post some pictures on Instagram. You gotta start somewhere!"