Do you see just like this just above this writing space? Click it and will you take to another web where you type in roman will convert to Nepali. You have to copy  it and paste here.  

your message:

साझा मा नेपाली मा टाईप कसरी गर्नि हो। मरी जानु पट लागेन लौन कसैले वनिदिउ। वर्खर वर्खर्ने पाली टाईप सिकिरछु एसो practice  गरु vaneko.