Can someone tell me where to upload my manuscript with KDP. I started an account, and have answered questions, and then they give me a choice of publishing now or set up for pre-order! I haven't even uploaded my manuscript, because I don't see where to do it. I'm not ready to publish by any means, I just want to upload and work on it. Can someone help me please? I'm lost!
I'm not quite sure what you're asking. Yes, you can and should preview your work once it's uploaded but before actually publishing, but it sounds like you want to do more than that.
You say you're not anywhere near ready to publish, so you shouldn't be uploading anything yet. Finish your manuscript, proofread it, edit it, have someone else beta read it, and THEN upload it and preview it before hitting the 'publish' button.
And others may disagree, but I don't see any point in having a pre-order unless you have a large readership waiting to order your book.