Who goes to shiva minyans, and would it be weird if I showed up?

I am a young professional (27m) who goes to, but does not yet belong to, a conservative shul with a fairly active congregation of young families mixed with older attendees. I am certainly on the younger end of the spectrum. I show up every few shabboses, but don’t do much else.

I get my shul’s email list, including shiva announcements with minyan times. Who normally goes to these, and would it be weird if I showed up at the mourner’s home? I love davening in small, lay-led minyans, and I always wonder if these minyans get enough people. It would make me immensely sad to not be able to mourn properly, and I don’t know anyone my age who would go to these. I worry about us losing the knowledge, not being in an orthodox community. Thoughts? Other experiences?