need pratice materials

One of the best ways to improve your technique is to pick up a relatively simple product and model it in Creo as accurately as possible. Start with something with a few components and relatively simple geometry.

Then, once it's complete, modify it.  Make it taller or shorter or change the shape somehow.  Suddenly, some of the flaws in your modeling technique will be obvious as the parts are difficult to modify without a lot of rework.  It's relatively easy to model something and capture the geometry, it's much more difficult to do so in a way that makes it easy to change.