Lv You outdoor photography

First of all, I don't recommend the D90. Too old. You can consider the following D7000.

Secondly, regarding photography teaching materials, you can go to the Hummingbird Photography Forum to see the works of netizens and the parameter settings of the works. Learn what parameters to use in the following situations.

Finally, after buying a camera, be sure to read the instructions clearly.

Looking forward to the works of the landlord.