Does submitting SIR for one school disqualify me from going to other schools if I change my mind?

I just accepted my offer of admissions from Cal Poly. I am a transfer student. I accepted it because I have to do so to apply for housing. I know it was probably too early to submit my intent to register, but I just want to make sure that I am able to live on campus in the fall. People say that the housing fills up very quickly.
So what would I do now if in early April I find out that a UC that I applied to (I applied to davis, santa barb, san diego, la, and berkely) offers me a lot of free money to go there? Do they know right now that I already submitted my intent to register to Cal Poly? Will that affect my application review process?
Have any of you accepted admission somewhere and then had to change your mind because a new, better opportunity was put in front if you? Any information would be greatly appreciated
I am a community college transfer, applied math major, GPA 3.88. IGETC is completed, and all available major pre reqs are completed. Also, I worked part time about 25 hrs/week my whole time at cc. My family is middle class and I am hispanic

No. You can retract your SIR if you decide to go somewhere else. You will have to pay a fairly large fee, though (somewhere between $100 and $200, I think.)

You will lose your registration deposit. Depending on the institution’s policy, you might get your housing deposit back.

Just be certain to fully cancel your enrollment so that you aren’t hit up for tuition bills next fall!

There was no registration deposit

Since you don’t know if you will get in anywhere else, continue with the process at Cal Poly. When/if you get in somewhere else you like better, that would be the time to notify Cal Poly that your plans have changed and that you won’t be enrolling for the fall.