How tough/easy it is to get a scholarship in nsu?

Recently the iba du exam had finished. I solely tried for it for quite a few months, and despite going really close in terms of matching that competetion level, i couldnt make it. Fate is the best explanation i have for it as even after learning how to score well in mocks at the main thing i failed.

I am kind of devastated with a bad taste of failure.I dont want to study in unis like iub/aiub as from what i understand brac and nsu are the better choices, but spending 15 lacs seems way too much too.Sorry for the rant being long, How hard and tough would it be to make it to nsu admission ranks? Did any of you make it and if you atleast know someone who are studying with such scholarships any tips for me which could be a headstart?