I am an Australian certified Shopify Marketer who does SEO. You're welcome to reach out otherwise I suggest you browse through the Expert profiles for others who can be of help. Lean towards someone who specializes in marketing rather than does everything from design and setup. Also get transparent reporting with what exactly gets done because this often gets swept under the rug with SEO.
You can contact me from my site www.digitaldarts.com.au
Hope all is well. I sent you an e-mail this week showing how I could help (I ranked a simple video for Amente on page 1) to email@example.com.
Let me know if you have another preferred email!