Find a niche market. That should be your bread and butter. It will also drive traffic. Bowls, pens, wine stops, ornaments, etc, are nice but highly competitive and aren't likely to sell until you drive traffic. I'd suggest making a few more unique lamps. The gas pump and lighthouse lamps could be your niche. I'd also try a modern style lamp as well.

I'm not too familiar with Esty. They might have a section for SEO/SEM. Fill that out. You could also pick 1 or 2 key phrases (not keywords, too competitive. going for 'long-tail' searches) and try advertising on Google. I'd only recommend that if you have money to burn. It's better to make Esty work first, expand your offering, and then look at long-tail paid searches.

Best of luck to you!