Welcome aboard.
I'm new here also. My fishing experience is mostly Northern Ontario. I just started fishing Lake Ontario in a nameless 14 ft Smokercraft with 25 hp last year. I caught a few salmon and one steelhead. Also one 8lb little Sturgeon in the lower Niagara river. That was a surprise!
Welcome aboard.
Your boat isn't too small for Lake O,
you do need to watch the weather. I've taken 16 ft, 27 ft and now a 14 ft boat out.
Be safe, have fun.