Cortana Notebook is the place to go to change settings
About me: Change your name and your favorite places
Connect Accounts: Add Office365, Linkedin and other accounts
Settings: Let Cortana respond to "Hey Cortana", clear history and a slew of other settings
Interests: Here is where you can fine tone Cortana to be your best personal assistant. Choose any or all of the categories toget the most from Cortana.
If you don't have a microphone on your computer, you can still use Cortana by typing in your questions where is says "Ask me anything"