It really comes down to what your preference is.
1) react-native-router-flux is just the wrapper around react-navigation but is a
lot easier to work with but it does not have a very good documentation and
some times you will have to look into react-navigation documentation for how
certain things work.
2) wix/react-native-navigation is native side solution for navigation a bit
difficult to work with but transitions are very smooth and it helps with app's
performance since it offloads work from javascript thread.
link: https://github.com/wix/react-native-navigation
3) If you are new react-native i would suggest you go with react-navigation it's
the most popular as of now and can cover all your needs.