College Major

I am interested in Astrophysics. Ideally, I would like to do Ph.D. The problem is that I don’t know if I am cut out to do that.
I am applying for a number of universities in the EU and I am also appearing for JAM and JEST in February.
Domains include Academia, Consulting, Research and Development (organizations like DRDO, HAL, ISRO, etc) or pure research (TIFR, IISER, IISc, IIST, etc)