No way on community colleges. Since you can afford 4 years that’s where you need to be.
It’s great of you are getting guidance that WUSTL works. But you still need back up.
Have you visited ? Y that school ?
What you’ll find at any flagship is that you have some Ivy caliber kids attending. Obviously not to the level of a Rice or WUSTL in quantity but there are some. Hence a U of A or ASU etc
Hoping a tip UC or CPSLO works. There’s other threads where the UC GPA and acceptance rates are posted.
Good luck.