Content generation for a new social discovery site

We are new social discovery site for sports, that is launching in 3 weeks, we are looking for a company to help us create accounts, post content (images, videos, products) that is sports related. Soccer, basketball, skiing, football, cricket, etc.. we are looking to create around 50 accounts and posts 100s of posts, that include creating lists, following other posts, and users, etc... so when we launch the site it looks engaged. This will also include creating newsletters in mailchimp to send out to users, and write a few blog posts.