Premiere Pro is incredibly simple to use in regards to choosing format, which is awesome!
If you aren't sure what format to use, don't worry. When the initial screen comes up, and asks you what format your footage is in (there will be a ton of options), simply pick a random one if you are not sure and then once you reach the main editing screen, import a clip from your camera.
Once you have done this, drag this clip into the "NEW SEQUENCE" tab, which should be just below your imported clips, and Premiere Pro will automatically create a sequence that matches the exact format of your footage, which is awesome, and then you can start editing!
Hope this helps, and good luck editing!