http://admission.universityofcalifornia.edu/campuses/santa-cruz/freshman-profile/index.html
Your English skills are affecting your ability to do well on the SAT and at a UC.
All of the classes are taught in rapid English. Reading and writing the material would be difficult for you, to not only keep up in the general education classes, but to study engineering.
All the ECs in the world won’t make up for your inability to read and write English well, which you need to do in an English-speaking university.
Engineering is impacted in all of the UCs, so that means your scores have to be better than the average student: 1800+
If you had difficulty paying to take the SAT, you’ll have even more difficulty paying for the UC’s at $55k per year, as a non resident of California.
Sorry, it doesn’t look like it’s going to happen.