Steps 1 and 2 are flipped. You should make the website _before_ you put your credit card in

Always use relative links like `../css/default.css`. Never use absolute links like `example.com/css/default.css`, never use domain-relative links like `/css/default.css`. Those will break your site when it moves between domains, between directories, or between schemas.

If you use relative links judiciously, you can prototype your site under `file://` and it will Just Work when uploaded