Should you even use microservices? I'd argue probably not. In my experience most people start looking at this because they hate their existing code (often for good reason) and just want to spend less time working with that code. It's just easier to do than refactor a monolith with serious problems...but then you have all the issues of a distributed system, and it's never been worth it in my experience.

If you find yourself in this situation, I'd recommend identifying the problems you have with your current monolith and hopefully refactor it, otherwise it's a lot more sane to gradually migrate to a new monolith by slowly moving responsibilities to it rather than attempting to go down the microservices route.