Use Google Maps! It deliver you also the Shedule and where to change!
The MAX (Metro Area Express) runs north and south to all the main destinations. It stops at 45th and Main, and you can walk east past the Kansas City Art iInstitute to the Nelson-Atkins
Very easy to get there using only the local bus service.
Depending on when you are coming the downtown trolley maybe up and running. Depends on where you are staying. If you are a walker and staying in the Plaza area its a nice walk. If not taxi or uber best way to go
Get quick answers from The Nelson-Atkins Museum of Art staff and past visitors.