You can change your online status on Discord and customize your visibility to friends and other users.

On Discord, "Idle" status usually means that the user has Discord open on their computer or web browser but hasn't looked at it in a while. If you want to manually change your status so you appear ...

Change Your Discord Status To change your status, you will need to be signed in to your account on the website or the desktop app for Windows or Mac.

Discord makes it possible to change your Username and Avatar quite easily. If you are having problems, then refer this post for the instructions.