How can I succeed in college?

Im an 19 year old college freshman have ADHD and I want to do good in college but I’m really struggling I can’t find motivation to do my work. I don’t know what I can do to make myself good at school. It’s still my first semester and I’m already behind and I feel like I’m too far gone. I’ve met with some teachers and talked to them but still I can’t get the work done and I don’t know what to do. What’s wrong with me? Has anyone else been in this position and made it out? I really want to graduate so I can become a teacher, it’s what I’ve wanted to do my whole life but I’m starting to think that’s not possible for me.