Text is awful, make sure to turn off anti-aliasing when using Volter font on any editing software also making the text size 7 with a border radius of 1. Overall the base itself looks alright, like @r0ck said for a first attempt this is up there in the 8-10 range.
This banner is awesome for your first time! A big 10/10! However as other people have said, in their with other banners I'd rate it around 8/10, the main reason because your volter goldfish font is too big, make it either size 7 or size 9, whichever looks right as it's different for some people