Once you are provided with your initial access to your Google Apps account you can (and should) change your password as you wish under the "Settings" menu item located under the Gear icon.
Once inside, there are several tabs you can choose from.
General - contains details on your signatures, auto responders, and other generic email settings. Follow the prompts to set up.
Labels - this is where you can set labels to categorize and organize your emails. Think of this as the same concept as "folders" on your Outlook, except the labels system is a much more flexible solution, as you can set one email to have multiple labels depending on the purpose, and you do not have to drag & drop to a folder to categorize. Also, labeled emails will still show up under the regular view so you do not miss a follow-up!
Accounts - this is where you can change your password, or enable this to use another email account. For example, if you have email access through your corporate domain such as email@example.com, you can configure your Google Apps settings so that all emails to the @sutton.com address is brought into your own domain email (which we recommend using over a general corporate domain for better personal exposure).
Filters - filters can be used to auto-label emails depending on the contents, the sender and other criteria you can set up. An easy way to automatically label emails as they come in so you do not have to!
Forwarding and POP/IMAP - a very important section where you can set up the email distribution to your computer, iPhone, Android phone etc! Always use the IMAP option as it gives you a more comprehensive cloud environment.
The other tabs are self-explanatory - explore, click & configure!
Note - Google Apps charges $50/yr (USD), and the price is subject to change. Other alternatives to email hosting include GoDaddy's SMTP service, Rackspace Corporate email etc., but we recommend Google Apps as it gives you the most flexibility.