1) Role & Market Selection

Not every company in the US is willing to deal with the paperwork for an H-1B or Green Card. If you pick a company that doesn't sponsor, you are essentially on a ticking clock until your OPT expires.

• Use websites like MyVisaJobs or H1BGrader to see a company’s history. If they have sponsored 0 people in the last three years, they likely won't start with you. Focus 80% of your energy on "High-Sponsorship" industries like Tech, Healthcare, and Engineering.
• Find an employer who views sponsorship as a "normal cost of doing business" rather than a special favor.