今次第一次自己飛去台灣...

攞左登機証, 就可以入閘架啦

如果你登機的閘口是很遠的, 你可以選譯搭機場內的地鐵, 係去某部份的登機閘閘口
如果唔搭, 而你登機閘口又鬼禁遠, 你都可以行去
去到閘口就會有該航空公司的人幫你

順帶一提
你攞左登機証而未入閘, 可以行下出面的舖頭或者食下野
如果入左閘, 你都可以行下入面的商舖
香港機場入面有好多舖頭, 有名店, 賣特式的
就算唔買, 行下都可以消磨下時間

我印象記得機場內, 好電腦可以上網的
你一定唔會悶

Well... As you will have to get to the airport 2hours before the flight depart... So there will always be plenty of time you got hanging around the airport...
But after you get your boarding pass, maybe it would be best for you to go through immgration first and find your boarding gates... Of which at Hong Kong, there would be plenty of signs directing you to the gates you will be boarding the plane...
And since at Hong Kong, there are usually some shops all over the airport and next or close to boarding gates, if its the first time you fly alone, I would advice you to find the boarding gate first then if you still have some time... Then just visit the shops around you as there are shops at Hong Kong Airport at a distance of every 2/3gates... So that you will have a idea of where your boarding gate is so when you go shoping around the airport, you can find your gate quickly after you finish shopping...
But beware that there is no warning anouncement made at Hong Kong anymore so you better watch your time and get to the get with plenty of time to spare (minimum 20minutes) but I would advice you to get there at least 40minutes ahead to just be safe...