Tips for a product photoshoot (bed linen) I inted to do on my own as a complete noob

Hello all, I humbly ask for some tips which might help make the mountain of a task I have at hand slightly easier. I am looking to start an e-commerce business and to sell bed linen. I want to take pictures using my iphone 17 pro in a friend's newly decorated bedroom. I want to use these to promote my brand on insta and as product pictures on the website. I cannot afford a professional photoshots (I have been quoted thousands of dolars, rightly so I guess).

Do you all have any tips at all for me as to how I can take decent photos (for my shopify website) using my iphone? I will need to capture a good portion of a double bedroom so its not as easy as taking a picture of a plate (I assume).

Any help will be appreciated - thanks in advance!