Profile picture

Is it possible to upload a still picture to your profile?

Welcome to the forum.

No, not directly. But you can set your email in your profile and then link it to a gravatar that you set.

Thank you. If only I knew how to link a gravatar to my email.

Just create an account and add a profile picture to the email.
In fact Gravatar was acquired by WordPress some time ago, so you also get a account, you manage the gravatars from inside that.