Most web hosts have various options for setting up a webshop with just a few mouse clicks.
When I set up hosting for clients on my servers I always include several Open Source cart systems, content management systems and similar that they can set up themselves or that I can help them with.
Take a look at 1&1 - I don't usually recommend them for hosting but they offer several very easy to use online cart systems with their hosting packages and you do all the work in your browser - no Dreamweaver or codeslinging required.
For larger shops you should look at Open Source systems like oSCommerce, but for getting started all you really need is a series of product pages with an option to buy, which can be easily achieved through static HTML and PayPal code snippets.
This is a vast topic with loads of ground to cover but without sailing off over deep waters and scaring the pants off you I would suggest you keep it simple: register a domain name, and use an off-the-peg shopping system provided by a large hosting company or spend an hour in Dreamweaver playing once you register as a seller with PayPal.
You will save time and effort and be selling in no time, once people start finding the online store.
At its simplest you could register a domain and build a series of static HTML product pages and simply add the PayPal purchase code snippet next to each of them.
Dreamweaver has product page templates built into it (where you find them depends very much on your version of Dreamweaver) and they are relatively simple to theme and style.
Several ways forward on this one, but the best could be simply to register a domain name, buy a year's hosting plan with any decent host and either home roll your system in Dreamweaver or ask your host for a 'point and click' online shop installer (or ask them to install it for you). Any good host will do this for you if you request it but the process is so simple they shouldn't have to - all they really need to do is make the installer available to you and about 4 mouse clicks later you have an empty online store to call your own
One final consideration (at this stage) is that you need to be able to get at your product database somehow so that if you ever want to upscale you can export all the input you already did and map that database to a new, bigger, meaner cart, but that assumes demand is going to go through the roof and that you will need the feature a larger system offers which, in your case, may not ever apply.
Any questions, feel free to ask