>>296510216
Nope, you should be able to upload at New User, or blue status. I think you can do a bit more at User/Green.

You also need to install the VRChat SDK2 for avatars, 3 for worlds to an install of Unity 2018.4.20f1 for uploading stuff. The SDK makes you log in with your account. It's actually a bit confusing and the first place to go for information is unfortunately the discord which has a #workshop channel.

The SDK handles the uploads.