How to strengthen a Psychology LMHC application?

So, I got rejected from my school of choice for my psychology masters application, which I...admittedly kind of expected. I was going in with bare minimum qualifications and just wanted to see if I could even get in.

Well, I didn't, and now I am looking for ways to strengthen my application.

I am looking into being a research assistant and/or an RBT, the only caveat with the latter being that I really do not enjoy working with kids, and that is mostly who I would end up working with.

Looking for alternatives or anything that worked for you or that you feel would stand out or otherwise be useful.