I am considering attending a physical therapy school in Poland which is three years long.
Why physical therapy? The job prospects are rather unspectacular, the wages, too, and the work that you, as a foreigner, will end up with will 95 out of 100 be in geriatric care, which is not particularly exciting or rewarding unless you are one of the few who have a true vocation in that direction .
Why not a much better paid allied medical career with much better job prospects like nurse anesthetist or nurse practitioner? This is time to be thinking more deeply about this in terms of future earnings and making wise decisions based on sound financial planning.
California is an extremely demanding state when it comes to medical credentials. It's hard enough to get credentials from other states in the US recognized in California, never mind from abroad. If California is your goal, study in California, or you just might find that you have to do everything all over again from day one. This is exactly what happened to a medical technologist I know who wanted to work in California (born and trained in the US).
On the flip side, wages for allied medical fields are higher in California than in the rest of the US. Double or more than what you would get in Texas, Florida or the South. So studying in California would pay off.