The Blackbeard pirates are too chaotic and dangerous for which you would be in constant danger, and the same goes for the beast pirates crew which is literally a jungle where the law of the strongest is in force and where if you are weak you will possibly be mauled by a bigger predator.
So the relatively better choice falls on the Big Mom crew where, if you can deal with her occasional rampages and the risk of being stolen a few years of life, everything seems to be more organized and peaceful.