I wouldn’t worry about regretting it – the effect of the stimulant medications wears off after a number of hours – so if you don’t like it after a few weeks of taking it you can just stop. There would be no reason to regret trying.
Like others here I have found the effect of mph on my son to be quite life changing. I don’t know how he would learn or be able to stay in school without it.
I also agree with the person who mentions that people with ADHD who don’t take medications tend to self medicate. There is research to support that view – taking medication halves the risk of drug problems later.