GOLF BALLS
So you need golf balls !
Which ones do I choose , the only way to find out what suits you is to try as many different ones as you can and then decide what suits your game and what you can afford !
When you watch the professionals play , they use a balata covered ball which allows them a lot of control. The downside is that these balls have a soft covering. As a beginner you are more likely to mis hit a shot which would destroy one of these balls. You will need a combination of a tough outer covering to cope with your game as well as a ball with a bit of give in it to allow you to play the delicate shots.
Experiment with different makes and hardness , you will soon find one to suit you , then stick with that brand to improve your consistency.