That's way too broad to be answered acurately. It varies from person to person. I've seen some spectacular first builds pop up over the last year. I'm to the finishing stages on my first build and I feel that it's quite good. Not perfect, but they never will be. The bottom line is that even with woodworking experience, it's a learning process, so be prepared to make mistakes. But with time, care, the right attitude, and a little creative problem solving, you can turn out a really solid guitar.