Need Help with Model Visibility and Sales

Jewelry is a category that has tens of thousands of models. Perhaps try to diversify into another subject that interests you.

Thank you for your response. You mean that I should explore topics outside of jewelry, such as home decor design, clothing design, and models for games and characters.

Don’t know if this is still active, maybe try it out. (https://www.cgtrader.com/profile/analytics/about)

Thank you for your guidance.

There are many projects on "Freelance on CGTrader" list that require custom models of jewellery. If you're skilled in jewellery design, you might consider applying on some freelance projects. This will not boost your sales but you may boost your earnings.
Even I'm not jewellery designer, I was hired for some projects in that field of modeling.
CGTrader is not only about selling models. Freelancing can get you much more earnings.

I can't get the first sale yet

Think about this - the number of customers is remaining more or less the same, or increase marginally over the years and at the same time the number of models is increasing rapidly, especially nowadays, when many sellers are "producing" worthless AI generated models by hundreds per day. There simply not enough visitors to view, yet alone buy your models. When i started selling models here 10 years ago, each published model was getting 50-60 views on the first day, when i publish a model now, it gets 15 views in 18 months. It doesn't matter that the quality of my new models is 10 times better, nobody buys them, because nobody sees them. Instead people are still buying older crappier models, because they've gathered more views and have higher rankings in search results. If you started your journey just recently, you have little chance to be very successful, unless you're exceptionally talented and are advertising your models like crazy on every social platform. C'est la vie.