Hii!
Frankly speaking, if you prepare well with full dedication and correct strategy, no exam is tough. You will definitely face some problems with some questions, but ultimately it all comes well if you have studied well. So, just give your best in preparation and stop thinking if the exam is tough or not. However, for bsc nursing, admissions are taken via NEET UG entrance examination also. So, you have to clear NEET ans then apply for bsc nursing course providing colleges during counceling.
Hope this helps.
Good luck!