For The Podium Robbery, you have three mandatory and one optional task.
Task 1: Gas Masks
In this mission, you must steal the gas masks from a fire station.
The gas mask crate can be anywhere inside the fire station, but it is always on the garage floor around the perimeter.
The firefighters will try to fight you.
Once you've acquired the gas masks, you must lose the cops and deliver the gas masks to your Salvage Yard to complete the mission.
Task 2: Rappel Equipment
In this task, you must break into a hideout to steal the rappel equipment.
When you reach the hideout, you must eliminate the enemies and look for a blue duffle bag.
Grab the duffle bag and leave the hideout.
Task 3: Sabotage Casino
This task is not indicated on the map by a green duffle bag, so some players tend to overlook it or don't know how to start it.
You will notice a small green Salvage Yard icon by the casino icon on your map.
Once you enter the casino, go past the vehicle podium and the lucky wheel. Go into the 'Table Games' section and go around the left side.
Keep moving forward and turn left towards more table games.
Go inside the restrooms and plant an explosive on the last toilet seat.
Task 4: Masks (Optional)
This task is completely optional and does not affect your robbery at all. Instead, it's related to aesthetics and what mask you wear during the robbery. So, you can completely skip this one if you want.
However, if you still want to do it, head over to the mask shop at the Vespucci Beach.
Purchase any one of the mask sets to use during your robbery.
With these initial tasks completed, you are now ready to proceed to the more involved Planning Work missions.