Hi Kas, welcome to the site!
I know how it feels to be wondering about a career but do let me offer a tad of advice/info... the graphic design market is saturated over here. There are loads of schools who offer courses and degrees in graphic design and loads of new grads trying to get jobs. The field is also a bit biased towards younger people so it can be a bit hard to break into. If you plan on doing graphic design, be prepared to work hard and try to set yourself apart. Not sure about web design but I think that, like IT in general, is a bit saturated, too.
Regarding forensics, I can't believe you'd have to be UK/EU born to get into this. If that's what you really want, make sure you're certain about this before giving up!
Good luck!