Web design is about code and not about tools. You would not learn how to build a house by learning to use a nail driver right? You would learn using a hammer because it is about technique and planning and not learning tools. One you can build a house you can learn to use a nail driver to speed the process (and easier on your back/knees).
Same here. To start learning, use notepad, that is what I had to use in school (and a horror called Emacs). Learn the code and how to work with it. THEN when you can create web sites, move up to free editors to help speed the process a bit. Eventually if you are serious, you can spend big bucks on Dreamweaver. But trying to learn a program AND code will just slow you down and make you dependent on pushing buttons. So learn to code first and then worry about learning an editor.
But unless you want to work in the industry, you really do not need Dreamweaver. I use free editors now. I just used Dreamweaver to know it well enough as this is my profession and it is the standard for the industry and likely what you would use in a company. It makes things easier & faster… not better.
Good web sites are produced by people, not tools.
Alternative Editors for Web Development
Do not fall for the Myth that Dreamweaver makes good sites or is needed to make good sites. You the developer do that, DW is just a tool. Avoid classes that teach DW along with web design. Take a web design class and then take a DW class if you like.