Look for a niche for creating a new website

I get to know about dropshipping. So i need a specific niche to start a website based on that. I would like to give this opportunity to you. What can you offer me on shopify let me know. Do you create website? Do you look a niche? How many products you look? Can you figure on a specific product so based on that we can create a website on that product or niche . And do you do marketing too? And what about suppliers and all . we can begin and provide me your package price . What different prices you offer and what work you do under that and for marketing how much you charge ? how much you charge for website? How much for niche looking ? Do you need one time payment or by day or on a specific work . Just let me know everything