Ask HN: Getting Answers to Ungoogleable Questions?

I have recently been architecting a cloud-based single board computer emulation tool, and I'm finding it very difficult to get my questions answered on StackOverflow and various subreddits.

How do you effectively find and reach experts? Especially on a topic you are fairly new to? (i.e. I don't already have a network) I wish I could pay someone more knowledgeable than me to just talk to me on a 10min video call.