Needs Tips on Organizing my Business Ideas

Hello, all I am currently building an online boutique where I sell jewelry and accessories. Some items I purchase wholesale-inventory & drop ship, some items I make myself, and some I sell as a direct sales/affiliate rep. I have so many ideas and not sure exactly where to start. Well, not completely true. I know I will start with resale, until I start creating pieces. Just not sure if I should just start with selling one specific items e.g. earrings. Or random items or random items that make sets. I am trying to write a business plan, but I haven't sold anything so I'm confused on how to completely create it with no idea on what my figures are. So I'm hoping someone can better explain that to me. Just not getting it. Anyways, I don't have a base client stream and my friends/family are not going to really support me as far as purchasing items. Hell, even liking and sharing my posts. So I'm wondering, how do I get clients when I don't know anybody? I have a very small inventory right now with about 7 pieces. I don't want to purchase a website with 7 pieces to sell, but should I at least promote on FB page? I know they say just put out what you got, but I kind of want to wait for a couple weeks till I actually purchase more products and have them on the way. And I was probably gonna use half if not all the pieces I do have as giveaways, not sure yet. They do have a little wear and tear, but nothing noticeably major. Just want to get a good solid plan going so I can stay in top of things. I'd appreciate any constructive criticism and I thank you for taking the time to read my post. Have a great day.