How to make the right website prototype?

Question

Layouts and prototypes

Hello. Guys, I want to make my first web service, quite simple, but that's not the point.
I want to make it user-friendly enough to be a pleasure to use.
Tell me with links how to make a prototype of a future web application. How to make it convenient and organize business logic?
I do this primarily in order to learn how to prototype projects and make them convenient!

Answer 1

Interface and business logic are slightly different things