I am playing sandbox mode

sry... I wasn't very clear...yes you can play the sandbox mode - but to learn the game and to know where to find everything you need, you should play the first 3 parts of the career (tutorial) so your sandbox game becomes a little bit easier because you know the things you need to get the zoo running and where to find everything (there is no building tutorial in there or for pathways, or terrain, just the things you need to know about managing the zoo... but if you need more help for that I recommend
Rudi Rennkamel on Youtube, who has tutorials on that).
To play without the tutorial first must be hard work to figure everything out, I wanted to make it easier for you, so if you decide to try that first, it can help you quiet well.

