sir i faild in 1st year diploma mechanical engineering in 3 subject then what i do
And also it's better for you that in which courses you have more interested just go for it.
Or try another year . Give your as much as possible time and also understand. And also give you better results. It's very important 1st introduce about your courses . Understand the subject.
For more information about mechanical engineering from below link
https://www.careers360.com/courses/mechanical-engineering-course
Thank you. I hope this answer helps you .