If you want to create a really powerful Shopify store, you can't do without the help of a professional. That's why I want to recommend a good article that explains in some detail how to choose Shopify developer https://getdevdone.com/blog/main-reasons-to-hire-a-shopify-developer-for-your-online-store.html , and a lot of good advice is given on the subject. They also explained the main reasons why you should hire a web developer and why it can be really important.