Clueless when I was at School.
A professional Illustrator - the latter I got close but with spiralling debt I had to revert to Plan B, and earn some money. Ended up with an office job as anything art related - graphic design, games design, illustration is extremely competitive.
A mate of mine had a similar path, a fine art degree, ended up on the corporate ladder and was doing very well. Simply quit and now gone back to his roots. Very brave, and doing well.
I am in a career I genuinely enjoy. Never ever planned, but luck, graft, played a part. Nothing taken for granted so always thinking of Plan C.