unless you weigh 100 or less i wouldn't expect much, if anything. since it is your first time if it was taken on an empty stomach you might feel awake and focused, maybe a lil energetic if you don't have ADD (idk how meds really work with ADD vs non-ADD people)...but i really wouldn't expect to be 'high'
how much do you weigh and what other stimulants do you do at what dose and how often?
edit: i read it wrong...so you do feel it. it should last 3-6 hours. 10mg comedown prolly won't be bad at all, you might even be able to keep your focus-ability during the comedown/after the initial effects, at least sometimes it seems like i do. during a comedown (much higher dosage) i'll get maybe irritable/edgy and anti social, but if i'm left alone i feel like i can still focus on hw or whatever