How can I get more experience as an uprising college freshman

I have grown up in Florida on the coast for pretty much my whole life and I am very passionate about marine biology and conservation. So far I have designed and ran my own event teaching a small group of elementary students about ocean pollution, its effects, and how we can combat it.

I have also volunteered at 2 marine centers
One I have been volunteering 20 hours a week for 6 weeks at a turtle hospital/ learning institution at a summer camp working hands on and the other I volunteer to work on projects they have for conservation when I can.

I am just wondering if there is anything else I can be doing before I go to college in about a month, specifically my overall career goal is research so if there is anything that I could do that would help me get my foot in the door there?

Thanks!!