i am a science student.my 11th didn't go well at all.i haven't done any higher level studies.now should i go for engineering or some other?

i don't remember anything from 11th and i have studied just the cbse course in 12th..so what should i do now?i am really confused...shoud i go for engineering or should i change my stream and opt for CA??? what are the other career options in science in which you are assured a job and a good salary?