A mechanical release would be much better and more consistent for you, especially as a new shoter. A release helps to eliminate many of the bad effects that human errors can have on arrow flight and give you a consistent release every time. As somebody new to archery you will find that the key to success is consistency, trying to do everything exactly the same on every shot. Take the bow to a local archery shop and ask them to help you set it up. Keep in mind that your fathers bow, while free, may not be a good fit for you as far as draw length.