What do you mean?
It is probably one of the easiest things to do in the eBay.
Create eBay account, link it with your Paypal and press the button sell.
There are lots of youtube video guides.
YepI think he means that he wants his listed product to be indexed on search results on Ebay as you know when you list an item you have to wait at least 24h before it appears on Ebay.
I have a very good aged account from 2007. I tried to sell digital product 2 weeks ago and they started to ban me 1 day and the other too, previously i was listing things instantly, now i'm at 24h waiting.
If you are a good seller, wait for indexing will be reduced, however, unfortunately will be 24h