A lot of the new locations for things are explained In this thread
It's a lot of info so narrowing it down for you:
1. Click your avatar on top right
2. Click "User Panel"
All user menus have a "double bar" navigation. Select the "main" navigation on the left, and the "sub-catagory" on the right.
How to Change your Avatar
1. Click The left side menu under "User Control Panel" and select "Profile"
2. Click the right side menu and select "Avatar
3. Upload your avatar (It has a size requirement)
>> The process will bring you to This Link. It's best if you figure out how to navigate the user menu so you know how to get in and out of specific settings
Anything without a home!