Greetings,
I am expert in After Effect, Please provide me the AE template from Envato, I can change the duration of the slides 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/UZstudio=
So, just hit the chat button,share your details and get the job done.
Thank you,
Maheen