Do I take the risk and go to UCSB?

[mikemac]

note they actually recommend taking the class during the summer if you can

If you are reading this paragraph early enough, you could come to UCSB and take PStat 109 and/or Econ 10A during the summer; we encourage you to do this
http://www.econ.ucsb.edu/undergraduate/advising.html

In the end nobody can tell you what is right. You have taken econ already, you know whether it seems to make sense or all seems like greek.