Attaching some posts about Nepal that will help you plan your trip. The posts contain itineraries, how to reach and a lot of other information created by real travellers. Let us know if there's anything else we can help you with.
If u wanna try something new. Travel Nepal from Delhi by bus. It will be a different experience. From their you can find a place called pokhara. To which you can travel its very offbeat place u can find in Nepal
Hey Stuti, Apart from already answered things, if you love trekking then i would suggest you go for Annapurna base camp.This is the best thing in Nepal after Mt. Everest base camp.