Typical features in a sound editing program
Introduction
Audacity is a typical sound editing program. It is also free so you can do a search for it, download it and set it up on your own computer.
Once you have access to a copy of Audacity, you can start using it and exploring the many exciting tools. Audacity is extremely powerful and you could try doing all kinds of things such as mixing a radio play or mixing a song using different musical sources.
You can use our set of tutorials here to get started. These tutorials are for an earlier version of Audacity but the differences are not huge. Alternatively, you could go onto YouTube and search for 'Audacity introduction' and find a set of tutorials that are suitable for whatever version you are using.