I'm not in the banking industry, but I would have thought that the chances of getting a very large unsecured loan in a country not your own are extremely limited.
Banks want some guarantee that they will recover the money they have lent. Your word is not sufficient, particularly if you are able to disappear to another country where the bank would have no right of seizure of your assets in the case of non-repayment.
I would advise that you approach financial institutions in your own country unless you can offer substantial security in the country where you intend to undergo your training.
Scroggs