> low level stuff like parsers, small KV stores and some network programming

That's not actually "low level"; you can pretty well do all of this using JS or TS. Go is very well suited for these kind of topics, and you can master it within a year. I don't see a necessity or clear advantage to learn C++ for these kinds of topics (mastering C++ takes 3 to 5 years).

> I have the FOMO of not learning to manage memory

There is no reason for this. It would be different if you would like to develop resource constrained embedded systems (those with less than a MB of RAM).