Assist me with my Shopify setup for my business

I am looking for an experienced Shopify expert to help me get my business off the ground. I don’t have a domain, but I am willing to purchase one if necessary. I already have a Shopify account, however, I need assistance setting up the products and finding a good supplier for my products in Home decor I can only find cheap ones with known over advertised products viral everywhere. I have a bit of an understanding of the basics , but really require help with a lot of the advanced aspects. Also my business plan - business email? - business bank account?? So much that I am so overwhelmed with what I really need to be set up

If you are an experienced and knowledgeable Shopify professional, please contact me regarding this project. Thanks in advance!