Go to the porn addiction or self improvement section of this forum and start a new thread there. Come and post daily in your thread. That's your journal
Basically, any new thread may your journal. Usually they are at "reboot logs". Go to "forums" section, scroll down and you can find "reboot logs" section. There, you can find logs based on your age (below 20, 21-24, etc) or your interest. Go inside, click "Post New Thread" on top right corner. That page is your journal. Copy that page and paste that on your profile details -"Journal Thread Link" tab.