So much bad advice on here.
OP, the first thing you need to do is confirm which type of automatic you have.
Is it a DCT, CVT or Torque Converter?
It's really important to confirm which type as you can destroy your gearbox if you don't drive it according to the type.
A DCT (Dual Clutch Transmission) is a manual gearbox with clutches that changes automatically by computer.
A CVT is a complete different thing and doesn't have any gears at all.
A Torque Converter is the old type that has been around for decades and is what most people think and "automatic" gearbox is.
You CANNOT, let me say that again, you CANNOT drive a DCT like you would a Torque Converter. If you hold a DCT on a hill using the accelerator, you WILL burn the clutches out. NEVER do this with a DCT. And NEVER creep in traffic with a DCT, you will damage the clutch, you have to leave a gap in front and drive into it, the car has to fully engage first gear or you will slip the clutches and damage them. So always use auto-hold if you have it, or keep your foot on the brake in a DCT. You can also of course use the handbrake.
A Torque Converter works differently and has a big, oil filled "box" that takes up the job of the clutch, so you can creep in traffic and use the accelerator to hold you on a hill.
A CVT doesn't have any gears, just a belt that spins across two different sized "cones", they are awful to drive and break easily.
Please confirm the type of gearbox you have before you end up destroying a very expensive Transmission.