“I got accepted… as an English major”
I have no idea how hard it would be to change majors at UIUC. Superb grades freshman year, if you can do it, might or might not help with the switch from English to CS at UIUC.
If you are able to switch from English to CS at UIUC, you pretty much cannot find a stronger university for CS. UIUC is really excellent for CS. As one example, US News recently had it ranked 5th, behind only MIT, Stanford, Carnegie-Mellon, and UC Berkeley, but ahead of Caltech, Harvard, Georgia Tech, UT Austin, Cornell, Princeton, and many, many other excellent universities.
If you get a degree in CS from UIUC, finding a job in either California or Massachusetts or Texas or anywhere else in the US should not be difficult. Employers everywhere in the US will know how good UIUC is for CS.