TBH, non-fans often win just as much as true fans.
One of ESPN's writers, Bill Simmons, does a weekly column where he picks every NFL game, every week, against the spread (not pure win-loss, but against the betting spread). His job is writing for ESPN, so he follows sports CONSTANTLY, and puts real knowledge and effort into his picks.
The last 2 years, as a joke, he has had his wife pick the same games as him. She knows nothing about football, and based her picks on things like uniform color, mascot preference, and cities she likes.
She has beaten him both times so far, one year by something like 10 games out of >100. The same is true with NCAA tourney pools, the amateurs often win. So go nuts, have some fun, and you might win anyway.