Also look to take your Air Law exam 1st as its the one that you can't solo without.
Yes you can go solo without air law but we usually make students take it unless they have a decent excuse not to.
Also as well the OP will be doing his first solo under FAA regs so will have to do there first solo exams anyway.
If you are doing a full time course if you can arrive with the exams already done and the examiners sheet already signed off you will find the whole thing less stressfull.
So I would recommend you do all of them before you start but make sure they will be in date when you get out there. And get a RT course and license done as well.
Start with
HPL -> Air law-> AGP-> MET -> Nav -> FPP and the RT exam you will have done with the RT course.