a mistake?

well i finished my workplacement last week and i really liked it except every1 kept sayin how they wish they didnt do engineering and if they cud do it all over agen they wuddda done marketing or accountin or somthing else. it was a bit scary esp since im not sure i wanna even do engineering... but then agen i did like the placement and there r worse jobs... but i dnt wanna b stuk in a 9-5 office job all my adult life... aarrgghh im soo easily cofused!