I have been taking some photos of people here and there and have realized I set my ISO too high. Now some of my photos and grainy and look awful. I have tried to do the noise reduction in Elemens, but it still seems like it han't changed much. Am I doing somthing wrong or is there something else that I should be doing? Any input would be very helpful.
Welcome to the forum.
Unfortunately, this is the Photoshop (Photoshop Elements's big-brother) Forum.
As the two versions of Photoshop differ, I will move your post to the Photoshop Elements Forum. Your links and any e-mail subscriptions should follow perfectly.
I have used Neat Image (commercially available), to handle "grain/noise" and there are two versions, plus one variation: as a plug-in for Photoshop (do not know about Photoshop Elements), as a stand-alone, or in a combo-pack.