Dont: pay for training, if they charge you that is their main business, take the easiest path or tech, just learn core things, copy others who stay late just for the sake of it. Most it NDA are hard to legally enforce, so when you decide to go full time know your rights. Dont pay 000s of dollars just to get out of the company. h1 fee is company responsibility.

Do: learn office etiquette and how to talk to others in a formal-semi formal setting, use basic office software and hardware (scheduling meetings, docking, email replies), check the companies h1b/gc application records, most nepali companies are only third party with no direct contracts.