Dear applicant it's great that you have immense interest in Interior Design course, this course comprises of the Art to decorate and techniques to enrich sense of art and design crafts as a part of Interior work. The subjects that you get to know as main and elective Subjects are

Interior Designing

Fundamentals of Structure

History of Art

History of Interiors

Theory of Design

Cost estimation

Environmental Studies

Interior Construction

Art and Craft

Introduction to Computers

Analytical Drawing

Material Exposure

Interior Materials

Basic Photography

Anthropometry

Art appreciation and appraisal

Ergonomics

Freehand Drawing

Fundamentals of design

Geometrical Construction

Research Strategies

Humanities

Design Process

To know more click on the link,

https://www.careers360.com/courses/interior-design-course

Good luck!!