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?