In the original TPT where it works, how can I get an avatar?
If you Check the show avatars option in simulation settings,you can see the avatars in save's comment section,your profile etc just like you see them in the website.
As for uploading an avatar,Click on my profile>edit>Upload avatar.
You will be asked to select a file and you are ready to go.
Setting up an avatar is very easy now compared to earlier times.
Good that is going to have this option in future versions.