Hi, Yu Ri

Astrobiology is an interdisciplinary field. If you want to become an astrobiologist, First you have to do your B.Sc in any of the following fields based on your interest.

• Microbiology
• Geology
• Biology
• Botany
• Biotechnology
• Physics
• Chemistry
• zoology
• Astrophysics
• Astronomy
• Oceanology

Read astrobiology-related scientific journals, which will help you to make your career better. In IARC, you can get short time courses based on Astrobiology.

NASA also provides astrobiology courses

• Space sciences Astrobiology- Florida Institute of technology
• Astrobiology minor program- Pennsylvania state university
• A certificate program in planets and life- Princeton University
• Astrobiology minor- Rensselaer polytechnic institute
• An undergraduate minor in astrobiology- University of Arizona

You can get some courses through online with the help of Mooc.

All the best.