Part 1 is supposed to be the easy part of the listening test. It is almost always a simple gap-fill exercise with basic information about some kind of booking or appointment.
But does this mean that you don't need to practise part 1? The answer is no.
I recommend doing lots of practice for part 1. You should be aiming for 10 out of 10 in this part of the listening test because it is likely that you will lose points in parts 2, 3 and 4. In fact, a good idea would be to focus exclusively on part 1 until you regularly get 10 out of 10. Get as many of the official Cambridge books as you can, and do all of the part 1 questions. Don't move on to parts 2, 3 and 4 until you master part 1.