first, download line from the appstore ( x ) or playstore ( x ).

once you have downloaded it you have to create your account, open the app and click 'sign up'

once you click this, you should get this screen 

you can use your number but i recommend you use the facebook option. 

log in to an rp account or your real facebook and just change the settings to post to 'only me' just to be secure.

after you log in to facebook you'll be redirected to this page.

agree to the terms to be taken here: 

put a display name ( please put the name of your chara, once i have accepted/added you, you can change it to whatever you want.) and set your dp to register.

from there go to more ( bottom right for iphones and top right for androids ) > settings > profile and click on User ID.

now you want to set your id / username. this can be whatever you want and does not have to match your character. 

and you're done! please also make sure you go back to 'my profile' and make sure your public id is on so others can add you.

this has been a tutorial by jungkook charges may apply. ( you all owe me cookies bye )