I ruined my first university year and I need to become an adult

Hello, I am a 24 years old guy. I started engineering this year but basically wasted it all, I did no exams, 0 out of 8 for now and I need to bounce back. I still have a few chances to do some, but my bad habits have gotten the best of me. I have an exam in 3 days and I will have to cram for that sadly. If I pass good if I do not I will try again. I need discipline. I need to make a vow to study every day at least 3 or 4 hours for the rest of my university life, because I am getting older and I am seeing my life slipping away and it's destroying me.

How do I do it, how do I make this my life? I struggle so much because my start caused me to get so behind, I would like to be able to graduate in 3 years but I think I gave up on that a while ago considering the situation I'm in right now. My parents are so supportive and I lied to them, in their eyes everything is going well when it is not. I am ashamed of myself and I want to become an engineer.

I know words don't mean much but I am already going to put much more time into it, I just need to do a lot of damage control. Probably I will not pass the next 2 exams and I will have more dates on September, I need to do it, I am tired of not doing what I know I should do.