Hi Ruth (Mecasonic),
Welcome to Zymic WEBMASTER RESOURCES. Skimming, reading and perusing is the best way to gain knowledge in this arena of webmastering (oh - so many things to learn). To gain the understanding that is usually associated with acquiring knowledge it sounds as though you are on the right track (do it till it drives you nuts , take some time away from the project and then return to it with the skimming, reading and perusals of information you trust will get you to your desired end-result).
While there is no doubt as to the productivity of Photoshop coupled with Dreamweaver it may behoove you to begin to learn at least some of the basic neccessities of a Valid Code Practice(s) that comprises even the most simplest web pages. The ability to "read" and "write" a web page (understand the Source Code of a particular web page) is greatly beyond any comparision to being able to create from W
et (WYSIWYG) program(s). Graphic programs are for graphic (image) endeavors and web pages are derived from text (programming language) that present (Code In) image(s), audio/visual(s) and textual conveyance(s).
Programming languages for a basic non-commercial site these days usually consists of HTML (or a variant such as: XHTML) and some CSS. A commercial site may be comprised of [X]HTML, CSS, PHP and Database(s). This is not to say that a web page (especially for the novice) cannot consist solely of pure HTML with no other language in this day and age but some of the flash and bang of what you want may be hard to align (properly present/display to your liking) in a pure HTML web page.
You are in a good position (not yet totally corrupted by lazy influences) to learn Valid Code as you learn (endeavor) to create your Husbands' e-Bay Store web. I might suggest that as you work through this creation that the spending of about one (1) hour a day working through an HTML Tutorial
(like at W3Schools) would be a benefit for your Husband and you down the road from this project (as you mentioned "...starting another website for the business, from scratch."). It all takes time and devotion and above all else - your participation.
Don't be afraid to create a Zymic Free Ad Free Hosted Website (just read the terms of service(s) and the like so as not to step on any toes) and upload your progressing work to view its' concept and design in the online environment. The "online environment" should (will) help you to recognize the quality (performance aspect, not appearance) of the web page. It is a benefit to check your work regularly (especially since you are using a WYSIWYG program that adds a lot more Source Code than is really needed to get the page to display the way you want).
You seem to have a great goal ahead of you and you should be aware that the commercialism aspect of your endeavor will eventually hit home and there are no WYSIWYG programs out there that will provide the secure commercialism aspect of an interactive business site for you. You'll definitely be eventually led into the realm of PHP and Databases (and you'll need to know how to Validly Code that secure comercialism aspect (or pay dearly - maybe even your first-born - for it)).
I hope that you take your time and learn the fundamentals of Valid Code while you work through this and your next couple of projects... we all want to see you succeed in your project to obtain your goal.
Hope this isn't too overwhelming for a Hello, Ruth.