I'm not a photographer but I have a camera and have gotten some pretty cool pics. The first thing on their list is a polarized lens and it's useful if you're taking a picture with strong reflections from the sun (and probably some types of lights as well?) but I know it's useful if you're trying to capture water and see down into it. I inherited a camera with a bunch of accessories and that has been helpful for a couple pics in the past
For the sd card see how long it lasts you. They can hold a LOT of pictures, capacity depending
