2 of the courses required for actuarial science are econ. Along with a finance course and some specific data analysis courses. If you're actually interested in becoming an actuary this could be really helpful.
There are 2 types of religious schools.
1. Nominally religions - don't have any specific policies regarding interaction between genders, sexual activity, stuff like that. They make you take a couple classes but there's no big emphasis.
2. Super religious schools make you sign a contract that you won't drink (even if it's legal), you can't have premarital sex, etc. Sometimes they force you to go to chapel/mass.
I think SPU is pretty religious, but it seemed like Seattle U wasn't when I was applying.
I've been through a very similar struggle to you. (Barely) Graduated high school, failed all my cc classes and dropped out a year later.
Then, I came back a few years later as a 21 year old and brought my GPA back up from a 1.105 lol. When I was applying to schools, I'd gotten it up to a 3.76.
There's a few things you need to consider. 1. Transfer students tend to get lousy financial aid. I don't know which state you're from, but with a 2.3 GPA the only schools that might be affordable and realistic are 2nd tier state schools. If I were you, I would re-take any class you got a D or F in, because you can petition to have your new good grade replace your old failing one. HOWEVER, not all schools will honor this, so when you apply to transfer down the line, you need to know if they practice academic forgiveness.