Hi!am a 18 years old girl from india.am goin to travel alone for the 1st time to HK next month.ill be changin?

flight in bangkok.i heard the airport of bangkok has change so am quite scared of getting lost in the airport or mayb ill miss my flight:(as i have no idea about the procedure.btw ill be travellin by thai airway.yet am excited to experience it..can anyone help me out by givin me suggestion for the procedure..i mean what should i do as soon as i reach the bangkok airport..thanks alot!