Where can i find online jobs?

I work as a night receptionist in a hotel (10PM to 6AM) i like my job but it leaves a good portion of the time i spend at work “unused” because it’s dull and i basically just sit for like good 6 hours, i have been trying to find some online stuff that i can work while i am at work, but nothing good so far. Any suggestions on which site i should be using?