Not only a DSLR kit is an expensive piece of equipment but very delicate too. It is very easy for one to come home; after a shoot, dump the memory card on your computer and forget all about cleaning this fine piece of equipment. Remember, it needs good care too.
When it comes to serious photography, photographers from around the world either prefer a Canon or a Nikon. But the question is: which one is the better of the two?
To answer in one word: “Depends”.
In more elaborated sense: “Both Canon and Nikon make cameras and lenses that are so good and so reliable that it is impossible to make a statement of which manufacturer makes better cameras or lenses.”
A well exposed photograph is a result of the correct Shutter speed, the correct ISO and the correct Aperture. The exposure triangle defines the relationship between all three of these photographic aspects. No single setting is just right or called an ideal exposure. The best way to learn this is to go out and shoot some photographs while taking notes of the exposure settings.