The handling skills safety depends on
Everything in the safety lesson becomes real when you actually load and unload a firearm. These are the handling skills you'll use every time you shoot, and doing them correctly — muzzle always safe, finger always off the trigger — is what keeps the safety rules from being just words. Practice all of this first with no ammunition present, until the motions are comfortable, then with live ammo at the range under supervision if you're new.
Loading / making ready
The general sequence (specifics vary by firearm — learn yours): with the muzzle pointed in a safe direction and your finger off the trigger, insert a loaded magazine (or load rounds as your firearm requires) and seat it firmly. Then operate the action — work the bolt or release/run the charging handle — to chamber a round, which makes the firearm ready to fire. From this moment the gun is loaded and will fire if the trigger is pressed, so muzzle and trigger discipline are absolute. At a range you typically only make ready when it's your turn to shoot and the range is hot.
Unloading
Unloading reverses the process, and order matters: first remove the source of ammunition — take out the magazine (or stop feeding rounds) — before clearing the chamber. If you cleared the chamber first with a magazine still in, the action would just feed another round. So: finger off, muzzle safe, remove the magazine, then operate the action to eject the chambered round, catching or noting where it goes. Only after both steps is the gun potentially empty — which you then verify.
Verifying clear — the chamber check
Never assume a firearm is unloaded; verify it, every time, with a chamber check. After removing the magazine and cycling the action, lock or hold the action open and both look and feel: visually inspect the chamber to confirm no cartridge is present, and where practical physically check with a finger, especially in poor light. This visual-and-physical confirmation is how you know, not hope, the gun is clear — it's the habit behind rule 1 and the foundation of safe handling, dry practice, transport, and handing a firearm to someone else. Make the chamber check automatic: any time you pick up a firearm, the first thing you do is check that it's clear.