Ps1821, you have had much advice and if you are a newcomer to this, it might be difficult to understand. Take pictures. Set the shutter speed about the same as the ISO speed (that's shown on the box/pack of the film), ie. ISO 100 shutter 125, (that's 1/125sec.), ISO 200 shutter 250,
(that's 1/250sec.) and TAKE PICTURES. Check your results and come back with your questions. If you took a shot of an F1 car on a racing circuit at 125 and wondered why it was blurred the forum will have the information as to why. Don't be shy, we all had to start somewhere, but do read and question what you don't understand.