There is a Mobil passport ap that you can use without global entry which should speed you up, in most cases you will have plenty of time if you misconnect you will be rebooked without charge, I for one wouldn’t hesitate booking but travel always brings with it the possibility of things going wrong so research your back up plan which it seems like you have by knowing the next flight, you can also look to see if connections make sense vs the 9 hour wait