100% scholarship in USA for Indian student

What all colleges should I consider for my masters considering my profile?

I have a UG degree from Mechanical, but then currently 2 yrs experience (3 yrs when I join for masters) as a data analys

I'm planning to go US for this spring 2022.I haven't taken any test so far. IELTS slots are filled till November. Looking for GRE waiver universities. I'm planning to take Duolingo test in next 5 days.

with only duolingo score will I make it to US for this spring 2022. If I start applying for colleges from Sept 15 onward

Do Professional LOR’s require any stamp from the company?

Do we need to get the lor sealed / stamped or is it not required and can we submit a pdf?

MS (Data Science) in USA for Spring 2023 without GRE

Hello, Please suggest any USA universities for MS in Data Science (Spring 2023) that I can apply for? M