First line is a reasonable very rigid schedule where you sleep 8hs, exercise/walk in the morning, and contain your distractions to a specific time in the day. A strict healthy diet. Plan when to interact with people and when to go to nature. Do a lot of visualization of what you want the day to be like (be reasonable). Time-blocking is very good (see Cal Newport)
IMO, only when you mastered the basic of a routine like that you should try prescription drugs. And even when you do, figure out how to need the least possible dosage. For example, eating a high-protein breakfast 1 hour before taking the medication and zero/low carb until evening. Then taking vitamin C foods with dinner to clear it out and prevent crashing or insomnia. Try well-timed over-the-counter supplements to improve how the medication works (magnesium, tyrosine, etc). IF YOU DON'T DO IT THIS WAY YOU WILL GET LESS DESIRABLE EFFECTS AND MORE SIDE EFFECTS. And you will risk spiraling into more and more mg and addiction. Remember: if you have ADHD you are very, very prone to addiction!
Ask your psychiatrist for a slow-release medication (Lisdexamfetamine or XR). And time how you react to it so it matches your ideal schedule. Have detox and reset days where you don't take the medication and don't study/work. (e.g. weekends or at least Sunday)