Re: New to boating? Never had a safety course?
I'm going to disagree with you- not about taking a course (everybody should), but about taking an online course if there's a 'classroom' alternative.
I'm a member of the U.S. Power Squadrons, and boater education is the reason we exist. IMO, there's no substitute for classroom instruction in your own area. You'll learn much about your local waters and boating conditions, from people who DO it every season. A classroom setting also promotes questions and discussions that can reveal much about best practices and situations that may be unique to your boating area.
Before taking the online courses, I'd check with USPS, CG Auxiliary and local law enforcement where you live. AND use those organizations to get yourself a free boat safety inspection before you hit the water for the season.
My .02