Nuts, before you apply for a visa, you may want to gain admission to top colleges in Nepal (like T.U.). For that, apply in advace . Usually, classes start after September, so you may have to apply at least a year in advance. Also, show a very solid financial statement, like bank accounts to the embassy. Include as mush as you can in your financial statement, like property valuation from an engineer. Last but not the least, be prepared for a tough and rigorous interview. During the interview, try to convince them that you intend to return to US after finishing your studies. Good luck. p.s. also, try to score good marks in TONFL (test of nepali as a ......)