http://booksbxfx6ciebutmfvorkotgfbwcwp24qpcxyuyen355z4eknxbzuqd.onion/dark/Laden_Kash_-_The_Dark_Web_%C2%B7_Exploration_Of_The_Deep_Web/THE_DARK_WEB_2.html
Startpage is almost as good as Google in the amount of searches it comes back with, but it is an affiliate of Google's, meaning it gets commissions based on the volume of advertisement on it's network. It is better than DuckDuckGo but because of it's Google link it is your second option. The Tor Browser is based on the Firefox system, so it is instantly recognisable and usable, you should have no problems working it out.