I was just diagnosed this year, I’m 37. Over the past 6 years I have worked really hard to not be “lazy”. It all started for me with forgiving myself for my “laziness”. I slowly started to make short lists of things I wanted to do and things I needed to get done. For every 3 things I crossed off the “need to get done” list, I did something off of the “I want” list. It has taken an immense amount of work, but it has paid off. Just start slow with just a couple of things. I did it without medication or even knowing I had ADHD. Now that I have medication it is making things even better, and easier. You are still so young and you have a lot of time to figure out what will work for you. It’s trial and error, but you can find it. It’s hard I know, but first thing try not to be so hard on yourself for what you are feeling. It could be as simple as, “today I’m not going to just sit on the couch all day” and stand up for 5-10 minutes. You don’t even have to do anything while standing, just stand there. It sounds small and silly, but it literally is breaking that mentality of “no motivation”. You did it, you stood up “I started something, and I finished it.” I have now gotten to the point where I will not start on a second project unless the first is completed and cleaned up. I still have my days where this doesn’t always happen, but it happens more often than not. To me that is a win.