new on reddit, 4 months, hardly ever opened it, so my karma is now only 1. how to know the karma requirements of a subreddit to post anything, its frustrating

A few days before, i tried posting in communities, but all my posts were auto-deleted. I couldn't just understand what was going on, and then i got to know about the karma thing. now finding all about karma.

And the communities dont even tell that theres a karma requirement and all; i had to google it