Grow social media account

I have just set up a new business on Shopify and have someone helping with SEO for the website. I have set up Instagram and Facebook and would need help to grow these accounts. My niche is handcrafted eco-friendly pet products and kid toys, as well as some handmade and hand stitched rugs, baskets and storage baskets. You should have proven experience in growing social media accounts. Your suggestions will be appreciated.