I mean, if what you want is the fastest way, nothing will be faster than moving to a country where the only think that matters is how much money and debt you have currently and how much you make in a stable job instead of looking at your history and past.
I never understood this system about building a score. You could be great with your money, always pay rent and everything on time, save up, have a good job and yet struggle to buy a house or car because you never took a loan or only needed a debit card. I also think it punishes low income people who have bad score because they were dealt shitty cards that rich people wouldn't have struggled with because, you know, they have money. It is also extremely unfair to immigrants.
I can't think of an example where this system benefits anyone but financial institutions and wealthy people. Common people can, at best, end up in a situation where the credit meant the same situation they'd have found under a different system and, at worst, well, much worse.
I also think it's contradictory: "you have bad credit because you never took loans". Duh, I never had to borrow cash, shouldn't that tell you something about how I handle my money?