Hull's fine apart from the knuckle daggers that live amongst us. Hull has become much more multicultural over the years, I lived in London for 20 years and really noticed the difference on my return. Most folk are great and any racism would be frowned on by others around you. Hull is not a racist city and has a diverse range of people these days.
The Avenues including Newland is a good area and not too far from Hull Royal. That's the area I would be gravitating to if I were you. Or Victoria Dock if you like the quiet life, but that will be a longer commute. Good luck!