Depending on your interests/needs, you might not find yourself actually writing network code, but dealing with it tangentially when things go weird. Programming blogs where people detail one of these weird edge cases and explain how they debugged them are super interesting and might be more relevant to your day-to-day work.

Here's one I really like, you could learn a lot just reading through all the networking-related posts here: https://jvns.ca/#computer-networking