Build a website

I have setup a shopify store. It was my first time. I need it to be SEO, google, facebook, Instagram and pinterest friendly. I need someone to check what I have done and modify and tell me the issues I have with it. I am not sure I want to run ads with google, facebook, or other socials yet but want it to be ready to go for when I do. The website is about handcrafted wooden, crosses, signs and name signs that can be customised. The website is currently live https://www.1msigns.com.au.