Hello pugetsoundwa, welcome!

You can make money with stamps but you need the skills of a salesman, and have to be able to do it in a businesslike manner. That means, don't turn into a collector and start buying, like most of us do.
Salesman skills can be learned. The simplest way I know to be a good salesman (and I am not one) is to be truly friendly, act professionally, no emotions, just passion, and learn what people want to buy and pay money for.
For a lack of knowledge (don't know where you are on this scale) the easiest stamps to sell are topicals (stamps collected around a topic or theme) like cats and dogs and such. It's not a really and truly

philatelic way to collect or sell stamps but it gets you started.
The more you know about a subject or era or a certain stamp series, the more chance you have of picking out that $100 stamp that you know you can sell for that amount and getting it in a lot for $1 or so. Of course that doesn't happen all the time or that often but not everyone has the highly developed skills of an experienced buyer and salesman either.
Don't be dismayed at the seemingly small money in stamps though (to start). Any activity is basically the same, follows the same rules that is, as stamps. The more you know, the better your chances. If you do not know about books and what works and doesn't and have no passion or are unfriendly and unprofessional then you just spent a wack of money on books (or whatever) and that's where it's gonna stay.

So go with your strengths, and if you don't really have any at this time, be realistically prepared to do some learning and get yourself passionate about something. That way it stays fun.
If you want to talk further I am puzzler47 on
ebay, as you meed 50 posts on Stamp Community to email through the forum's system. I haven't been selling lately but am always interested in how others sell and what they do to get the job done. I sometimes just look around on
ebay (and other sites) to see how things are being sold and trying to figure out what works and doesn't. A side hobby of mine.

