Final answer:
The first step in cleaning a firearm is to ensure that it is unloaded, which is essential for safety.
Step-by-step explanation:
The first step to start cleaning your firearm should be to make sure it is unloaded. This is a crucial safety measure to prevent any accidental discharge while handling your firearm during the cleaning process. Through this precaution, you ensure your own safety and that of others around you. It's also the standard initial procedure in firearm safety guidelines when conducting any maintenance.