I got in from waitlist

what to do now that I got in as undeclared? how am I gonna transfer to an engineering major in ucsd

Here is the information but just remember changing into Engineering is not guaranteed. Do you have any direct admit options, if so you might want to consider those options instead.

https://jacobsschool.ucsd.edu/assets/includes/academic/docs/Capped_Majors_FAQ.pdf
https://jacobsschool.ucsd.edu/academic/academic_undergrad/undergrad_majors/

If u were me should I go to UCSD as undeclared or go to SDSU as computer engineering major

I would prefer to go to the school that guarantees my major. Much easier to switch out of Computer Engineering vs. switching into if for any reason you change your mind.

Is there any other major at UCSD, you would be happy pursuing besides Computer Engineering and has a better chance to declare? If not, I would go with SDSU. If you decide to attend Grad school, UCSD can be a good option.

Remember, where you go for Undergrad will not define you, it is what you do with the opportunities you are given that will make you successful.

Best of luck.