What is the first law?

If there is no net force acting on the object, then the object will maintain a constant velocity.

An object will remain travelling with a constant velocity unless a resultant force acts on the object.

Object at rest or moving with constant velocity remains so unless a net/resultant external force acts

Newtons First law states that an object will remain stationary/at constant velocity, unless there is a resultant force.

Essentially Newtons first law states that an object will keep doing what it was already doing as long as no new force is applied to it.

So it if was moving East at 10m/s then it will keep moving East at 10m/s. It's velocity (speed and direction) remains the same.

If it wasn't moving at all (stationary) then it will remain stationary. Same as above - it's velocity (even though its not moving at all) remains the same.

Once a new force is introduced the resultant force (the force that tells you the direction and by how much) will no longer be zero, so the object will either change the speed or direction it's moving in or start to move if it was stationary.