Finn, you're in California. UC Berkeley bundles Architecture under the College of Environmental Design and offers BA, MA, MS, and PhD degrees. Take a look at the department website at http://ced.berkeley.edu/academics/architecture/. Click on Programs then Bachelor of Arts and look at this page. Especially look at the Accreditation and Licensure section at the bottom of the page; it tells why UC Berkeley is an outstanding choice for a degree in Architecture.
You say that you're not a people person. If you really aren't a people person then get some counseling to help solve that problem. Why? Look at the picture on the BA page. See all the students working together? That's a major part of working toward a degree in Architecture, working on a wide variety of projects with other students and being able to communicate with them and take a leadership role. During your undergraduate years you'll want to have an internship at an architectural or environmental design firm, working with staff at that firm. You'll need to apply for that internship position, and to convince them that they should take you on. Architecture includes being able to market yourself. That takes people skills and the ability to demonstrate that you're a people person.
Download the Architecture Major Handbook (the first link below the picture on the BA page). Look at prerequisites and the lower and upper division course requirements.
To be successful in Architecture, and not end up as someone who draws and edits someone else's designs on a computer all day, means getting a Master's Degree. If you're going to be considered for a position in a firm that has major construction projects that means a Master of Science degree.
When you have a good understanding about the Architecture program at UC Berkeley, contact Undergraduate Advising at (510) 642-4943 and talk to them. Ask to schedule a meeting with a professor or an instructor on the staff (not a TA) and take a trip to Berkeley and talk about your goals and what you'll need to do to be admitted to the Architecture program, and what you need to do to graduate with the degree you need to be successful.
Based on your estimate of your family income I think you'll be able to get financial aid that could pay most of your fees and other expenses, though I don't know if the aid includes dorm and meal plan costs. While you're visiting go to the Financial Aid office and talk to them. That means you'll need current family income so they can evaluate your needs.
Whatever you decide, good luck.
Colin