What is BEST & FAST/shortest travel time by BUS from HKIA to GUONGZHOU - city/town center

only 1 or 2 options for going from HKIA to GZ town/city (bus) ?

1. take from arrival hall an airport BUS / Airport Expreassa directly from HKiA to GZ?

2 or
take a Bus from HKIA to Zhenzhen first than take another BuS from LoHu to GZ

HKIA to GZ tby direct BUS take total how many Hours ? compare with to direct to shenzen and by bus to GZ ?
finally fastest & shortest time by BUS going to GZ or go to shenzhen first then to GZ

are LOWHU, LOHU the same station ? both in shenzhen ? or 2 places (in Lowhu in HK & Lohu in Shenzen)

easy to find budget hotels in GZ BUS termination point / stop ? as I have to catch a flight/plan the next morning from GZ - Baiying airport to SJJ Dayong airport 12 noon

thanks teaams