I understand your desire to attend UCLA or UC Berkeley. I am very familiar with many Hawaiians attending colleges outside Hawaii based on my own experiences when I was in college and from own relatives’ and friends’ kids recently or currently attending colleges in the mainland. Many of the reasons has to do with more jobs; opportunities in the mainland vs. Hawaii. Also, the big name colleges in the mainland are perceived to be better than the University of Hawaii. Many of these Hawaiian people are will to pay high out of state tuition or private school costs.
You have a good plan. The community college route is the best to transfer to a UC and least expensive. For UCLA or UC Berkeley, you should maintain the high GPA, say around 3.7+, to have a good chance in transferring to those schools.
If affordable, many Hawaiians also like USC since the school gives out financial aid if you qualify. Same for other private schools.