To build a prototype: no. You'll build something that someone can use, and then you'll find the parts of it that aren't working and fix them. You'll learn what

To build a prototype: no. You'll build something that someone can use, and then you'll find the parts of it that aren't working and fix them. You'll learn what you don't know on the way. Don't think of each idea as "Product with N engineers and X DAU", just build a thing and then add incremental improvements.