Most of us here felt OSU would be out of reach for you financially . However, -since your sister is attending - did she get a very generous scholarship? Are you hoping to get something similar, if that’s the case. If so, we may need to rethink our advice. FWIW, ACT midrange is 28-32 for OSU, and you’re at the higher end of that. I believe you would be competitive for many of their programs, but perhaps not CS. I don’t think they accept directly into the CS major.
On a separate note - congratulations to your family on being so accomplished!