The standard of care best practices with stimulant medication is to start at the lowest dose and increase only if and when necessary. The fact that you were started at a higher dose explains much of the struggle thus far.
The first medication tried rarely is the right one when dealing with ADHD. There are two types of stimulants: amphetamine (Adderall, Vyvanse, Evekeo…) and methylphenidate (Ritalin, Concerta, Quillivant…). Almost everyone does well on one type or the other, but not both. You may not do well with amphetamines.
And, you don’t have to be impulsive or hyperactive to have ADHD. Without those symptoms, it’s inattentive type.
ADDitude Community Moderator, Parenting ADHD Trainer & Author, Mom to teen w/ ADHD, LDs, and autism