Publishing’s a fairly opaque industry. Here are some resources I’ve found helpful as I started my publishing/public writing journey.
General
Penguin Random House Publishing Resources
Publishing Industry Resources (created by Shelly Romero)
First Draft podcast “Track Changes” miniseries
POC Literary Organizations list (via Kundiman)
Find Publishing Jobs
Best for Big 5 & agencies
For Big 5 publishers, make sure to check their Career pages for the latest listings
Best for indie presses and literary magazines
Where to Submit
Best for indie presses and literary magazines
Something I’ve found helpful is just following a lot of publishers and magazines since they’ll often post if they’re open for submissions. Magazine/journal editors will also post when they’re looking for submissions, so consider following some editors, too