If you want to learn to code like a pro, stay away from Dreamweaver. That’s just MY opinion. Invest in a text editor such as EditPlus2, which colorizes text for all kinds of code, HTML, CSS, PHP, etc.
https://www.editplus.com/
There are a lot of great CSS tutorials out there, and I also recommend getting some good books on the topic.
Online Resources:
HTML Dog, as JB pointed out, is an excellent resource; here is a link to some more, all in one place for you to bookmark:
https://www.mezzoblue.com/zengarden/resources/
Books:
CSS Mastery by Andy Budd
Bulletproof Web Design by Dan Cedarholm
CSS Anthology by Rachel Andrew (you can get it for $9.99 as a downloadable PDF at Sitepoint.com)
Also, if you use the FireFox browser, you can download the Developers Tools that allow you to view and edit your CSS and HTML in real time right there in the browser. A good way to run duwn some of those pesky nits.
Also, validate, validate, validate. The act of doing that also shakes out things like typos. (Ask me how I know THAT so well!)
And for the time being, until you can get your site up to speed, changing col
in your textarea to 70 (70 columns) or 75% will do the trick. ??