Switch major after received a bachelor degree

Hi
I live in the state of CA. I am trying to get a degree in Computer Science, either master or a second bachelor. I already have a bachelor degree in business. After some research, it seems that my options are very limited. Many school’s master program will only take students with related bachelor degree. (like UC schools) So, I was hoping if getting a second bachelor would be an option. But, many schools do not accept or very limited accept students already have a bachelor degree. (like SJSU) I feel so frustrated now. I feel like I am stuck here. The school system in california do not work well for students seeking to change field.

Could anyone give me some suggestions?