Rookie Owner

I'm a low budget owner. My site is on Shopify. Anyone willing to do look over to let me know where I need to improve? Ahrefs.com rating is 99... but other sites are lower. I know it's just a guideline score and not the answer to seo. If I'm not far off, then I'm guessing I need to work on backlinks. Being a very niche topic, I have my work cut out for me. Website is based off Beard Care. Extremely niche... If you have time, your guidance would be appreciated. Ken - Bayard Beard and Body http://www.BayardBeardBody.com www.BayardBeardBody.com