Earth highest mountains and deepest oceans seem a lot to us, but as compared to the size of earth they are nothing. So it is not like some animations of globes that are made in such a way where you can feel rough high surfaces near mountain ranges and deep oceans. But in fact, it is super plain more than a glass ball.
Let me explain you how. The highest mountain Everest is 8.8 Km high from sea level, and the deepest point on earth is Marianas Trench in the western Pacific Ocean which is almost 8 to 10.9 Km deep. Consider the size of planet earth which is 40000km in circumference and convert the size of earth to a centimeter scale i.e 40000cm. Now the highest mountain would become as 8cm and lowest point in oceans as 10cm. Then further reduce the size of earth to 40cm and the height of mountains would become just .008cm or .08mm. So if you have real earth as a globe of 1.5 foot size, you are unable to feel the depths of oceans or heights of mountains as they are less in size than the ridges of your finger prints. Even if you pass your fingers thru Atlantic or Pacific ocean your fingers will not get wet as the water will be too less even to wet your fingers.