Welcome to the Bunnings Workshop community @ange89. It's terrific to have you join us, and many thanks for your question about building a chip shot golf game.
It's wonderful to see that @Remarka6le has already tracked down some comprehensive plans for you to follow. Make sure to take plenty of photos of your project, as I trust our members will be keen to see what you create.
Please let us know if you get stuck or have questions.