You can view your profile at https://musescore.com/user/. In the three tabs at the top, anybody can see your publicly shared scores, scores you have favorited, and any sets that you have created. On the right, anybody can see who you follow and who follows you, and any groups you have created. However, there is a lot more information you may choose to make available here, or not.
To update your profile picture, hover your mouse over it (if you're on a computer rather than a mobile device) and click the "update image" button. You can update your cover image the same way. If you don't currently have a profile picture or cover image, there will be an "add image" button in its place. It is not currently possible to remove an image without replacing it with another one.
In your settings, the following sections are relevant to your public profile:
- Account / Contact settings
For full details on these, see Account settings.