ticketing for concerts in asia!!

hi guys!! i don't know if this has been asked before but how does ticketing for asia concerts/fan meetings work? is it really that hard as people make it out to be?

for reference, im in oceania and i wanna see some groups that don't come to this side of the world LOLLL (mainly singapore, korea, japan and anywhere in SEA)

but i am not really planning for anything in particular now -- i just wanna know for future reference e.g future ateez/svt concerts and fan meetings. i have heard from people that using global interpark, buying proxys or having international friends is your best bet but i don't know how to go about doing any of that lol

i have also seen certain sites for japanes/korean concerts and festivals in which you have to have a national form of ID, a korean/japanese adress and/or phone number, etc etc.

if anyone would be patient enough to break everything down, that would be greatly appreciated!! also, any advice/tips/personal experiences and recommendations would be useful too :))

edit; specified concert countries