>>536391856
>>536391449
I am not saying its super easy but it far from impossible. most anime conventions have plenty of things to do where you can meet people with similar interests. At the last animecon I went to they had seminars bout 3D printing, figure painting like warhammer etc, cardgame corner and even mahjong. It cannot be that hard to talk about similar interests. Compliment the TCG deck they play, talk with them about when and how they got into their hobby and maybe compliment their cosplay if they are wearing any.
Small talk is key but most importantly there is no need to make friends immidatley. Just getting used to talking to people is good enough for first steps.
alternatively join coop games on here and make friends that way. I have made multiple friends almost a decade ago on /v/ from 100% Orange Juice threads.
TL;DR Fucking talk to people about hobbies or other stuff you share with eachother you dumbasses.