Hi welcome to OpenStreetMaps. I noticed you added the entire park as a beach. Beaches should only cover the sandy part along the water not the grass though for small lakes like this it’s usually “natural=sand”. Also the “name=“ should only be the official name posted on a sign at the location. 

If you would like to know more about editing OSM, there is a wiki https://wiki.openstreetmap.org/wiki/Tag:natural%3Dbeach