This is a very common question among new runners and there isn't one answer that fits everyone since beginner runners sometimes struggle for different reasons. Many new runners might that the turning point is when they can run continuously for 30 minutes. At that point, they start to feel more comfortable and confident. So, it takes a little bit of patience to build up your fitness and get to a point where running feels easier. Just keep working on increasing your distance little by little – it does get easier.