FARGO — By his own accounts, Ryan Fritz wasn’t a good student when he graduated from Fargo South High School in 1990. Since then, he’s found success as a businessman — founding Office Sign Company 18 years ago — and as an artist. He’s looking to gain more attention for the latter, participating in The People’s Artist competition, an event supported by actor Johnny Depp. The event showcases artists across the continent and their work, allowing vi…