Also, let me dump a few more resources on you to help you get up to speed.
Check out the FAQ if you haven't already.
https://www.4chan.org/faqBookmark
http://iqdb.org/ right away. It's a very useful website to have if you ever want to know "Who's the girl in that picture" "what anime is this from" or "who drew that?". It also has a list of several of the main booru's on the homepage, if it turns out you don't like using danbooru.
I also encourage you to register at whichever booru turns out to be your favourite, as it opens up new options such as image-favouriting, tag-filtering, and increases the number of tags you can search at once.
