If an object has a lot of inertia, how does this affect how easy it is to move that object?

Motion of an object with lot of inertia:

All objects are immune to changes in orientation. This phenomenon is evident in all objects-inertia is present.  

Inertia and mass  are the major factors.

But are any objects more likely than others to avoid changes? Definitely yes!  

There are various masses in the propensity of an object to avoid shifts in its movement. Weight is the quantity that depends only on an object's inertia. The more momentum an object possesses the more mass it has. A bigger body is more likely to stand up to changes in its movement.

Suppose on the physics demonstration bench, there seem to be two matching bricks. Nevertheless, one brick is made of concrete and the other brick is made of steel mould.

How can you say the brick had been the Styrofoam brick by raising the bricks? You should give the bricks the same push to change their movement. Brick with the least strength-and therefore brick with the least weight–is the brick that provides the easiest path.