h1b is very risky these days i would say u have 30% chance to get approved, if desi consulting firm is ur sponsor then its a big red flag, direct clint letter ( not desi ) might give u big relief which u dnt have. so far there has been no issue in other visas but as far as H1b is concern its a huge risk go back nepal to get stamped.

if u have non it background( including engineering) then its almost impossible to get h1 stamped, but then if u have IT background as a major subject in university then answe these questions with confidence,
where did u study ?
what was your major subject?
how long u been working for this company ?( actual clint not desi consultancy)
what u do in job?
what ur annual salary?
do u have supporting letter ?( that u work in this conpany.. this long..ur pay.etc ..

if u answer these types questions confidently.. ur chances are high..
but, never in any conditions, mention that u work for desi consultancy...