ISO; 100 Aperture; 6.3 Shutter Speed; 1/250

ISO; 400 Aperture10 Shutter Speed; 1/100

ISO; 800 Aperture; 10 Shutter Speed; 1/100

ISO; 1600 Aperture; 14 Shutter Speed; 1/1600

ISO; 3200 Aperture; 29 Shutter Speed; 1/400 

My best photo was with ISO 3200. 

Yes.

I learned that when you take photos around sunlight it makes it harder because the sun can go away or come back anytime and your photos won't come out the same.