Entering the U.S. and finding PMF for your product need not be a random act of GTM!
A market based structured approach is possible for PMF - called Five Factors Framework - which can lower risk and speed up your time to success.
My course PMF: Essentials for Entering the U.S. Market applies this framework in a stepwise manner to build your market entry plan, as explained in this published article by Bloom VC
Learn the core PMF Five Factors Framework in this 10-min video.