Hi Jeff, welcome to the forum!
I'm delighted you're developing H5P OER content, and see that you've asked this question here and in the Moodle in English forum. You've already got an answer from Mary there, but perhaps I can answer the other questions you asked via email?
- MoodleNet shouldn't interfere with what you've got planned, as it's a place to share resources (which can then be imported/exported from Moodle Core)
- If you'd like to get involved in the next round of testing, please sign up at new.moodle.net!
Thanks, Doug. I did sign up, yes.