It would be nice if you told us what it is you're trying to do? We have no idea what existing page you're referring to or what application it is? Also give us some info about your Mac and which version of OS X it's running.
OK - I have a long web page that I'm building in iweb, I want to insert copy and a pic' somewhere near the begining, the only way I know how to make room is 'manually' move everything that will be after my insertion - I'm imagining some device or procedure to easily facilitate this - (are you an airplane guy?) - Mac OS X v10.6.8
Codecademy is great! I found it really easy to learn HTML and CSS coming from a graphic design (for print) background. It's really fun too. I used to try and get away with using Dreamweaver without knowing HTML and CSS but once you learn it everything is just so much easier - and you know it's done right. I now use Sublime Text. Really happy with that too.
Give it a go. It's not a hard as it seems. Codecademy is the way to go.
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