Hi, I'm looking for help to advertise the following..for example

German 2 euro commemorative coins. Each year has 5 issues from different mints, so I want to make an ad with options ..Firstly the year, second one of the 5 mint letters.Can anyone walkme through the process please.

I'm reading  eBay  help articles, but I find it so complicated that I gave up. HHHHeeeeeeeeelp