Most of your questions are answered in the spreadsheet, which is linked on the first post of this thread.
Regarding switching to CP, you may have left that too late already. When you submit forms to KCC for processing, they need about 4 weeks to process them before they are ready to schedule an interview. So, if you did that now, you might get an appointment for September but most of the early spots will have been scheduled already. I personally think EU will get stopped before the end of September so switching to CP is playing with fire at this point.
On the other hand, AOS is possible but also risky starting in September. Processing aos in one month is possible, but you may not even have the whole month of September.
And before all that, you need to go current at 47XXX - quite a big jump.
So - you need to spend this weekend getting prepared and make a decision for CP or AOS. Whichever you decide, you need to act fast, and you will need some luck! - So, best of luck!