To start with 3D printing engineering, consider whether you want to build your own printer or learn about them. If building, resources like the RepRap website and forum are recommended, while purchasing a kit can simplify the process. For immediate printing, familiarize yourself with a 3D drafting program, although many users suggest starting with pre-made models from platforms like Thingiverse to avoid the steep learning curve of modeling software. The discussion highlights the importance of understanding both the hardware and software of 3D printers for successful operation. Engaging with the online community can provide valuable insights and shared experiences in 3D printing projects.