Hi Gretchen,
Congrats on your new purchase and thanks for choosing Surface. You can find information on the device at Surface Laptop Go 3 features - Microsoft Support for features like the fingerprint reader.
Much of how you interact with the device is through the operating system, so knowing how Windows 11 functions is important. If you haven't already, you may wish to also look through What's new (microsoft.com) to get started.
Hope this helps you,
Greg