It’s a good idea to learn about the rules of the road before and as you start driving. The sooner you learn these rules the easier driving will become and you’ll be preparing for your theory test at the same time! The best place to find out about these rules is in the latest edition of the Official Highway Code book. This is also available on line (see link below) or as an app.
Another very useful book is the Official DVSA Guide to Driving. It’s packed full of all the information you ever needed to know about safe and skillful driving.