Computer Science is a very big field and the best option to you can choose here is computer science engineering. There are various specializations in this field. You can go for Computer Science with some specialization in your undergraduate level, or may complete graduation in Computer science engineering and then pursue higher studies with some specializations.

The various specializations are;

• Artificial Intelligence and Cybernetics
• Big Data Analysis
• Reconfigurable Computing
• Interference Design
• Embedded Systems
• Computational Geometry
• Modeling and Simulation
• Computer Graphics and Visualization
• Human Centered computing
• Bioinformatics
• Machine Learning
• Medical Image Computing

You may find your field of interest from these specializations.