Mass and Newton's 1st Law

An object at rest stay at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. One example that happens in my own time is when I play basketball with my friends every time I dribble the ball the ball goes on a fast speed because at first it wasn't moving so my force and pressure made it move and bounce around , it shows inertia because I think that inertia is about mass and speed . A other example is when I'm playing volleyball when I spike the ball the pressure of my hand makes the ball go over the net , it shows inertia because of speed. A other example is if you try to pull a table cloth without knocking out what's on top of it, to but the very end on the cloth on the table and then pull it with your two hands very fast if you do it slow it wouldn't work. It shows inertia because it's about weight mas speed.