Congrats on the acceptances! While Iowa has a wonderful writing program, as others have said, if it is not affordable and the cost to travel to/from adds to the challenges, sadly it may be out of reach.
I have to disagree to a degree with the “college is a place to get job skills” comment. If you wanted to learn a trade, you’d go to a trade school. College is an opportunity to sharpen critical thinking skills, to learn to analyze, reason, explore areas of interest, etc. But developing some skills/tools to increase employability, especially when you have an interest in a field that is hard to break into and is not high paying initially, and living in CA is expensive, is also important.
There was an article I read recently that noted that communication majors were seeing declining salaries (I think it was in Newsweek). That said, it may be a good double major option for you as it would allow you to break into a writing field after college.