Perhaps you should start with the accessories category, something small like phone cases. These items will help you generate sales faster and will also get reviews within a few days.

No general selling advice can solve the fundamental problem: not knowing which product categories are truly profitable right now. Seasonal demand changes dramatically in the summer, and what seemed profitable in March may remain unsold by July. To sell well on eBay, you need up-to-date data, not intuition. For example, you can find out what to sell on eBay here ​https://easync.io/articles/what-to-sell-on-ebay/​​​