@pazhhalysta . . . let me try this again.
All the immediate in your family lived in one state in the United States of America, and up until a bit over a year ago in a state other than California. Your mother moved to California, leaving you, your sister and your Dad in this other state. We know it’s the US because you’ve alluded to taking a course at Brown along with the US State Dept funding your study of Russian. Your dad had to work long hours, leaving you to take care of your sister. But because your mom is a resident of CA now, you’ll have residency for UC and UCLA. (This sounds a little like David Hogg’s situation because he has CA residency (which he won’t use because he’ll be going to Harvard), though he attended high school in FL because his dad works for the State Dept.) Don’t tell us anymore info. Your dad moved out and has left you fending for your sister and yourself, which I presume to mean that he’s got some heavy duty work going on. Even if you didn’t have CA residency, cost wouldn’t be an obstacle. But If you indeed have CA residency, this will, of course, apply to the state’s community colleges which would be an excellent way to get into the UCs. Again best of luck and I’m all talked out.