Where u go wont matter. Having the major won’t matter. You can do MechE and go Aero for work - my son is. All that matters is ABET accreditation.
What kind of GPA unweighted ? SAT ?
Are you flexible geographically ?
You can apply to U of Arizona now - looks at unweighted GPA only. Solid merit depending on GPA. Great for Aero.
Or UAH in Rocket City. Huntsville AL. Yea it’s far but it’s cheap and it’s among all the aero companies. Good GPA and SAT for merit.
Both taking apps.
Otherwise you have no choice but CSULB unless you have other acceptances too.