Under camera just put the model number like D5300; Once you put the first letter like D you will see a list of all the cameras in the database pop up. The more numbers you put in the smaller the list becomes. When you see your camera just click on it, Be sure to click on "Save Changes" in the lower right corner.
Welcome to the forum. There are quite a few D5300 shooters on here. I have one and a D7100. Photo quality from each camera is pretty equal. The D5300 is a great camera and will produce some great photos for you.