How to add a photo to replace the generic avatar in the Apple TV+ account?

Hello y'all!

:-)

I was just browsing my Apple TV+ on my iMac in Safari. The account contains a very generic avatar next to my name. I would like to replace this ugly avatar with my own photo.

Does anyone know how to replace the avatar in Apple TV+ with my photo?

Furthermore, in the account, I clicked on a link to the new Tim Gunn and Heidi Klum show [I don't remember the name.] that I was presented with. However, I saw no way to add this show to my queue! I looked everywhere and tried right-clicking everything that I could think of.

Does anyone know how to manage my Apple TV queue on my Mac?

Thank you very much for your kindest consideration of my questions. I look forward to hearing back from you, and I will await your reply.

Take good care and stay safe from the coronavirus!

:-)

~Antonio