All of these features are available from the home screen, which you are normally presented with when you first log into OBIEE 12c.
http://[server]:[port]/analytics in your browser, and after the login screen, you should see the home screen. Remember to change the port number if you changed it during installation.
Note that your browser version is important. Our advice is that you use Firefox 10 and Chrome 17 onwards. Please refer to the full Oracle Certification Matrix for a complete analysis of what is supported.
Looking at the Home screen, we can see access to the features described on the left-hand side: