I can recommend this site https://www.sellersandfriends.com/buy-the-elder-scrolls-online-gold if you are looking for gold to buy
For most of the people you have to give them what they want. In my opinion yours have everything for beginners, but more advanced players more informations could be nice to watch. In this guide http://www.snf2020.sitew.org/ you can find more details
I think that this guide will help you to understand how guilds works https://sellersandfriends.soup.io/post/687651539/ESO-Guilds
For an example this store
You can sell it also on ebay and similar sites. There are tons of webpages on which you can trade it