Buy a legal vape device and e-liquid from a reputable source
Read the device manual
Charge the battery fully
Fill the tank or pod with e-liquid if needed
Let the coil soak for a few minutes after filling
Turn the device on
Set the wattage or airflow if your device allows it
Place the mouthpiece between your lips
Inhale gently while pressing the fire button if required
Exhale slowly
Start with small puffs
Stop using it if you feel dizzy, nauseous, or unwell
Keep the device away from children and pets
Follow local laws and age restrictions