How should we deal with similarly named communities?

Right now there are similarely named communities across the fediverse.

"fediverse@xxx", "Linux@xxx", "asklemmy", "askkbin"..etc...

I'm on kbin and I'm having a hard time figuring out how to use the fediverse more productively, by reaching the largest amount of people for asking questions, solving problems, simply put: to engage... like I used to do on Reddit?