FIRST TIME TRAVELING TO HONG KONG FROM UNITED STATES

HELLO MY NAME IS JAMES I HAVE A FEW QUESTIONS OR I NEED SOME HELP I AM A AMERICAN AND I WANT TO TRAVEL TO HK FROM DENVER,COLORADO FIRST TIME FLYING OUT TO ANOTHER COUNTRY I HAVE PASSPORT BOOKLET WOUNDERING WHAT ELSE I NEED,I HAVE BOTH PASSPORTS,LICENCES,SOCIAL SECURITY CARDS, WHAT ELSE DO I NEED OR WHAT DOES HK IMMIGRATION REQUIREMENTS FOR AMERICANS TO ENTER OR WHAT WILL THEY ASK YOU AT THE AIRPORT, DO YOU NEED SHOT RECORDS,HOTEL RESERVATIONS,ROUNDTRIP FLIGHTS,ENOUGH MONEY,I HEARD SO MANY STORIES AND SO MUCH DIFFERENT INFO DON'T KNOW WHAT TO DO OR WHERE TO GO FOR HELP SO IF ANYONE CANT HELP ME OUT OF GUIDE ME TO RIGHT DIRECTION AND HOW TO GET MY AIRPLANE TICKETS ROUND TRIP CHEAPER I THINK I CAN STAY FOR 90 DAYS 3 MONTHS FOR AMERICAN PASSPORT HOLDERS,I FOUND SOME ON TRIPADVISOR OR OTHER SITES AND HOW SAFE IS IT TO GET YOUR AIRPLANE TICKETS FROM SITES LIKE THESE!!!!