Decent and motivated sisters of the nation during parade. The image shows the platoon of lady cadets during a parade. It’s not a passing out parade as it’s night time and not the day one. It probably is the Azadi Parade or else some other parade or a passing out parade training session (very unlikely).
Pakistan Army Lady Cadets parade

Can I join army
Depends on your qualification and if you fulfil the requirement criteria for the department that you want to join.