D5100 setting question
On the KR website you will find a starter that will show you how you can setup the D5100 :
Once you know how to change the D5100 settings ( including AF settings ) , you can experiment to find YOUR settings.
If you want to experiment with picture controls and white balance, you can shoot RAW (+jpg).
With the free nikon ViewNX2 program you can then postprocess the NEF files and change picture controls and WB and other settings AFTER taking the picture and observe the difference on your pc screen.
ps : some interesting tutorial websites :
If you want to learn about CNX2 :
my photos (examples, see dpreview galleries):