Two books I recommend to everyone, but especially if you are a new manager: https://www.powells.com/book/managing-humans-biting-humorous-tales-of-a-software-engineering-manager-9781484221570 and https://www.powells.com/book/radical-candor-fully-revised-updated-edition-be-a-kick-ass-boss-without-losing-your-humanity-9781250235374