My age is 35 yrs.I m doing pvt. Job. I want to continue my education for my best career. Please suggest me.?

My age is 35 yrs.I m doing pvt. Job and not satisfied about my job and due to my late hour timings. I want to continue my education for my best career. Please advice me......I m married and responsible for my family. but i want to do some other field. p