You seem to be a little confused. You say that you've downloaded Mobipocket Creator. You use that to convert your HTML file(s) into a Mobipocket book. This can then be read directly on the Kindle.
If you have questions about creating Mobipocket books, they are best asked in the Mobipocket file format forum:
https://www.mobileread.com/forums/forumdisplay.php?f=168