Not getting download

Of your small portfolio, you even have one duplicate. You should remove one. Also, have you considered submitting to stock sites that actually specialize in selling t-shirts? I'm not sure that people looking for t-shirt designs think of coming to Adobe first to find them. In addition, t-shirt and other "swag" sites take care of the printing for the buyer. Adobe does not, which is simply more work and expense for the buyer. They have to provide the shirts and pay for the printing.

61 is a tiny portfolio, and you cannot expect a regular stream of sales from so few assets. On average, only 5% of the AI assets in the Adobe Stock portfolio have ever been sold. You'll need a much larger and diverse portfolio of saleable assets to earn regular sales. Some of your assets are on themes that are already over-represented in the database, such as t-shirts with slogans. 

It's way too soon to expect sales. You've barely started this journey. It takes time to develop a portfolio of content that appeals to lots of different customers. 

Compare your profile to other established content Contributors. Don't copy them. Use them for inspiration. It helps to see what your competition is doing differently.  

• https://stock.adobe.com/contributor/206029493/addictive-stock
• https://stock.adobe.com/contributor/43115/photocreo-bednarek
• https://stock.adobe.com/contributor/206947972/audshule-stocksy
• https://stock.adobe.com/contributor/206947972/antonio-jes%C3%BAs-rodr%C3%ADguez-vicente-stocksy
• https://stock.adobe.com/contributor/206681074/michael-schauer

Hope that helps. 

You were lucky with your first sale. You simply don't have nearly enough assets in your portfolio. You will need at least 1000-2000 before you start seeing regular sales activity.