I'm from USA and I contacted my military attache they will tell you everything you need to know and how to get in, please contact them for a quick response.
You cannot directly join any branch of the SSG you must get selected by the ISSB, get into the academy, graduate, then serve for a certain amount of years, then apply, after that if you survive the cut you will be inducted into SSG.
ISSB isn't hard just practice like any other exam and you will get in, alot of people apply for it as a side career not really caring if they get in so they dont put much effort into it thats why alot dont get selected.
If you join the armed forces you receive a contract so you cant really...
Pakistan should definitely execute him, our image does not matter as if UN really wanted to help Pakistan they would have said something on Kashmir. Secondly we are fighting a war on terror caused by the UN they need Pakistan no matter what they say.