Thanks for writing! This is a great question and there are tons of resources for you on PRX, on the web and in this community. Is there a particular kind of advice you’re seeking? For example, if you’d like to know about polishing your production, take a look at the “For Teachers” tab and check out the Guide to Peer feedback. Although you’re giving advice to yourself (and not your peers), it contains some helpful guidelines for getting audio to the final stages.
Next, check out PRX Pointers – http://www.prx.org/help/prx-pointers – to get help on how to upload your piece to PRX most successfully (the more polished your piece page, the greater the chances the work will get licensed).
Finally, I’d definitely reach out to some of the other producers who are doing science-focused work. In particular, check out the folks at MIT-based Terrascope Radio; they’re combining youth radio and science in whole new ways.
Best of luck!