The way most programs work in the US/UK is that you submit an application in fall/winter (December-January), hear back about admissions decisions in the spring (February-April), and start the program the following fall (September or October). I know it's a bit different from the application cycle in other countries, so hopefully that helps.
As for your chances of getting into those specific programs, I have no idea. I do know that USP is well regarded among academic institutions here in the US so you have at least that going for you!
Good luck!