Can I Boost My JEE Mains Score from 5% to 90%?

Ans: To become an astrobiologist after 12th standard, one must focus on pursuing a bachelor's degree in a relevant scientific field like physics, chemistry, biology or geology, then he should look for specialized master's programs in astrobiology at universities that offer them, and eventually consider a PhD to further specialize in the field and conduct advanced research; gaining research experience through internships and projects is very important throughout his academic journey.
Main steps:
Choose a strong science foundation in 12th grade:
Opt for a stream with Physics, Chemistry, and Biology (PCB) as it provides a solid base for further studies in astrobiology.
Undergraduate degree:
Pursue a bachelor's degree in a related field like physics, chemistry, biology, astronomy, or geology.
Look for universities offering courses in microbiology, biochemistry, planetary science, and environmental science which are relevant to astrobiology.
Master's degree in Astrobiology:
After your bachelor's, actively seek out master's programs specifically focused on astrobiology. Search for the universities in net.
Some universities may offer specialized programs in planetary science, space sciences, or related fields which can be a good alternative.
PhD in Astrobiology will be the ultimate end and after Ph.D also you can pursue your research and go for multiple PDF from Indian or foreign universities. Though it's an off bit line and job opportunities are much less as compared to other sectors. Mind one thing the moment you are specialized the job fields become narrow and for that you need to be a real specialist, not a namesake specialist for self-satisfaction. To know more and more about less and less is research and true research leads one to specialization.

Some important aspects to consider are given below.
Research experience:
Actively seek research opportunities through internships, undergraduate research projects, or assisting professors in their research.
Technical skills:
Develop proficiency in data analysis, programming languages like Python and R, and laboratory techniques relevant to your research area.
Networking:
Join professional societies like the Astrobiology Society or relevant astronomy organizations to connect with other researchers and stay updated on the field.
Potential institutions to explore:
In India there are Indian Institutes of Science Education and Research (IISERs), Indian Institute of Space Science and Technology (IIST), Tata Institute of Fundamental Research (TIFR). In international level NASA is there.
Best of luck for your dream stream. May God Bless You. I am always available for you. Professor...................:)