Hi Aya,
I am expert in After Effect, Please provide me the PSD file, I can animate an Instagram post straightforward animation simialr to the attached example of Juice Post with with adding white lines according to your project brief.
I have already successfully delivered similar projects in the past and I would love to share the portfolio with you:
https://www.freelancer.com/u/YHstudios
So, just hit the chat button,share your details and get the job done.
Thank you,
Maheen