Welcome to TNW Basics, a collection of tips, guides, and advice on how to easily get the most out of your gadgets, apps, and other stuff. Facebook today rolled out its Avatars — the Bitmoji-esque cartoon lookalikes users can make of themselves — to users in the US. That means millions of users will now be able to build their doppelganger to use in comments and Messenger. The customization options are pretty extensive, so if you want to build a little mini version of you, then you can get pretty close. Doing this brings Facebook a little closer to Snapchat, which…