> an employer who can provide you with an H1B VISA

How difficult it is to search for such employer?

> H1B VISA is the real challenge

Can Canadian Citizenship (which can be obtained easily compared to H1B) an alternative to H1B visa?

> Master's Degree program at the best American University

Is this path easier?

I am already pursuing what you have said(my leetcode skill is not good enough but i am atleast on correct path). I am Open Source contributer and have done many projects and contributed to few other projects.