Hey malospam -
I hear yeah! There is a lot there and it can be overwhelming at first. One really easy way to help narrow down is to find an exhibit that you like and click on the component of the exhibit. Notice in the Scene Outliner, if the item selected begins with BP_ then right click on it in the scene outliner and find in content browser (or alternatively CTRL-B). It will take you right to the Blueprint or asset you want to see.
Also most of the blueprints that you will want to see are going to be found in the EXAMPLECONTENT folder of the Content Browser with sub-folders which are logically laid out when you first open the Content Examples.
Hope that helps you get started,