when I export my work it comes with the background that I have deleted and my pixel goes weird.
Your export is in jpg format which does not support transparency.
You can export to GIF or PNG to retain the transparency in your piece.
The extra pixels around the outline of your figure may have been an artifact of converting non-black transparent pixels to opaque ones. You shouldn’t have to worry about what color your fully transparent pixels are though – just use an export format that supports it like PNG or GIF.
Thank you so much!