How do i uploaded pictures on here from my phone when asking a question?

You have to email it to yourself from your phone then download it to either google drive or you computer files. Then you can go to where ever you saved it and select it and then copy and paste it. Or you could attach it to your question when you are writing it which would be much easier. FOR EXAMPLE: go to the attachment.

you can only change it if your real name or personal information was in it. and if so you would need to contact them directly with a username change request.