Social media manager

We have a brand new e-commerce store. Our market is the USA, looking for social media marketer to help us create posts, captions, copy, and contact with influencers. We don't have social media account right now, looking for someone to start from zero and growing account together, need to have experience in social media, how to gain followers fastly and create organic traffic to our website. Need to complete tasks without help, need to have their own responsibility. We expect a freelancer that takes responsibility and helps us with his/her own ideas to grow the company. please share with us your past experience and portfolio