What Should New ebay Focus on First When Starting on eBay?

Hello everyone, I'm learning more about eBay and would like to know what new eBay should prioritise in order to establish a strong foundation. I'm just looking for general guidance, typical mistakes to avoid, and lessons learnt from experience; I'm not endorsing anything here. I appreciate you sharing your knowledge.

Best tip is to stalk other sellers doing really well.

Look at how they title their listings, how they set their price, do they do free shipping, what images do they use? Do they promote their listings? What niche are they in? What have they been selling the most of.

Most of your answers can be found by looking at what other sellers are doing well at. Filter by all their sold listings and boom you're in. Notepad and pen and write everything down that sticks out to you.