For couple of days pretend yourself that you know everything but dont be oversmart and never say I am sorry I am new and I dont know,Just say this is new environment for me and I can get along with new environmet soon.Dont be nervous, they not gonna make you do major duties or task for couple days.. Just try to learn more and more. go early and try to stay longer .Nepali guys always rocks at work . Make sure to note everything.