strategies for sharing teaching information with universities I don't personally have contacts with
I've reached out to a few universities but so far my strategy is to just send an email explaining my goals and wait. No one gets back to me.


Unfortunately, as other questions on this site attest to, this is probably to be expected. Especially if you reach out to "universities"; my guess is that you won't get help from them at an institutional level. But if you find individual people who share your interests, your chances might be better.

I would recommend starting at your own university. Many universities, at least in the US, have teaching and learning centers, or some variant. Their purpose is to support instructors who want to improve their own teaching. They might be able to answer some of your questions directly, or put you in touch with others who can.

If you go to conferences, I've found those to also be great places to discuss teaching.

You might look for instructional materials directly on the internet. Sometimes the instructors who created these will make them publicly available. (In math this is fairly common.) You can learn a lot by reading these directly, and the people who created them might be more likely to respond to cold e-mails. Perhaps not your big-picture questions, but they might be happy to answer questions about their course materials.