ADHD-finally going to get tested.

Hi everyone. After years of contemplating. I finally want to get tested for ADHD. I am a woman in my 30s & have done about on and off 5 years of talk therapy. (a little more consistent the last two years as I finally found a great therapist). The therapist brought up medication, but I just wasn’t sure. Idk. I did try sertraline for a few but just felt like it didn’t help. I then noticed all my chaos came from my brain constantly going 100mph even when my day wasn’t. As I “healed” a little more I guess it became clear to me how crippling that was. My brain never has a quiet moment. Amongst other symptoms. If you have been tested for adhd how was the process? If you were prescribed meds did they work? Was it hard finding the right provider? What is the best med to make my brain chill a little bit & not get tired out from thinking about doing something, than actually doing the thing?