If you'll be managing a technical product and other developers I'd recommend reading 'Managing Humans' by Michael Lopp (aka rands) - https://www.amazon.co.uk/Managing-Humans-Humorous-Software-E...

Short chapters so you can read it in chunks, its entertaining and based on his experiences.

Included it in this list of start-up books I wrote ages ago but you've reminded me its worth re-reading - https://medium.com/@KatAlexPas/an-hour-and-a-half-a-day-of-r...