As long as you first find a stable and good enough job it's probably fine and not _that_ hard.

There will be a ton of papers to deal with, including some banks that apparently aren't open to US citizens (probably because of taxation ?), but I don't think it's much more than for most countries on the globe.

Speaking/Writing will also be a big part of it, but it's not insurmountable. You'll survive without it for a while (you've found a company willing to hire you anyway), and probably spend a few years learning before being fully proficient (reading contracts etc.)

PS: I'm not american, so there's a bunch of details I might be missing but I haven't heard of specific troubles on that front.