This may be a stupid question, but how do you decide in what community to ask questions?

I want to try asking more questions online since it has become so difficult to find things with search engines.

But I don't really know where to post my questions?How do you decide what community to post to?

For example:I have a question about meditation.This looks pretty straightforward, I search for 'meditation' under all communities.I find 2 communities called Meditation. (I can find more if I search on another lemmy instance, but they don't seem to show up on my current instance)Both of them look rather inactive.

Do I just post to both of them? Is it possible to post to multiple communities simultaneously?Should I look for other communities, what to search for?