N Visual arts
NC Drawing. Design. Illustration
NE Print media
NK Decorative arts
NX Arts in general
TR 1-1050 Photography
TR 845-899 Cinematography. Motion pictures
L Education (General)
LA History of Education
LB Theory and Practice of Education
LC Special Aspects of Education
LU Children's Literature
Start here to expand keywords, and to find basic information (about artists and movements).
Here are a few very basic searching tips (for books and databases) that you should definitely keep in mind when doing your research regardless of the database you are using.
Be succinct. Practice! Backup your presentation (Dropbox is great - and you get 2GB of free storage)!