I need help with this and how should I begin with the social media part and how to write the memo explaining my chose?

I need help with this and how should I begin with the social media part and how to write the memo explaining my chose?

You are a social media manager for the Transportation Security Administration (TSA), an agency under the Department of Homeland Security. You have been tasked with creating a social media campaign to recruit 250 new TSA workers. Select the appropriate platforms and craft ten social media messages complete with links, images, videos, gifs, and any other interactive content. You are welcome to use resources that have already been created such as YouTube videos or stock photos, but please remember to cite your sources accordingly. In addition to creating the social media messages, I need to explaining this in 1-2 page memo describing to your supervisor why you selected the social media channels that you choose. Please discuss target audience, goals, and your organization's objectives in the context of your social media messages and plan to recruit the 250 TSA workers.