I started my business selling gf bread from my house with a website then grew into a store front in 2 yrs. I don't know where you are in your journey. Do you already have a store front? I developed a website with my products on it to sell, went out and started finding places to sell my bread, started an Instagram account for it and the sales increased and I grew out of my house. I started in 2020. Everyone ordered through my website, giving me a day and time to pick up and I developed my customer base. I did not run ads. But I don't know what your product is. I don't think you should worry about store design - back burner. Customers and website development is my suggestion and my experience.