We all know that Islam teaches a woman to reveal herself only to her family & other females. If I make account on Instagram and upload my photos, then is it correct? Because here I am revealing myself to everybody but only by photos & not physically. So, By doing would it be against Islamic Laws. I mean it wouldn't be something like losing my 'pardah'.
It is not recommended for a Muslim girl to make a social media account, and also not recommended to upload photos of oneself online as it causes a lot of fitnah and destruction.
You can have WhatsApp with only your family and female friends, without your photo on profile pics.
MAY ALLAH GUIDE YOU THE RIGHT PATHS.
Islam teaches both men and women to be modest. What modesty means is interpreted variously by various cultures. Islam also teaches men and women to be at home in the world. As social media is part of the world, it is not against the use of social media. It is what one actually writes or does that matters.