Have you ever hired a consultant?
I'm in the aforementioned situation, and thinking about seeking outside knowledge on topics where I lack experience. Curious how you may have approached something like this?
I found both of these an enjoyable experience and I was told by both that it was incredibly beneficial for them.
How I'd approach it: Honestly I would just check the HN freelancer thread and start emailing people, get a quote on a day's worth of whatever it is you want from them: code review, pair programming, etc. That's a relatively small investment that will probably give you an idea of whether this is worth pursuing, with them or in general.
I am personally fine with taking on anything that is >=1 day of work, some people probably won't want to do anything that isn't a much longer project.
In any case you're trying to find professionals that will respond professionally and should be able to break down how their time can benefit you. So just email some people and let them prove that they meet those criteria.
Before hiring someone, think about collaborating with someone else in the same position. Organising a regular screenshare or meet-up where you both go over these things and provide feedback. Like a language exchange: 30 minutes speaking English, 30 minutes speaking French.
I'm curious if there is a forum or service for these kind of exchanges?
Disclaimer: haven't used them yet, so can't comment on quality.