Lots of people like the idea of having a new car but often find the process of buying one stressful. Often we are constrained by budget and want to try and get the best we can for our money. For some people it is all about the looks, for others reliability is the main aspect to consider.
It is always good to have a rough idea of what sort of car you are looking for, the age of the car and/or mileage and the money you have to spend. It may be that you already have the money to buy the car or perhaps you are going to be looking to get one on finance. If you are going to be having it on finance, be sure to work out how much you can afford to pay monthly towards it.
Look on the internet are local dealerships to see which ones have vehicles you are interested in. Ideally you want to try and find a car garage that have made more than one car that takes your fancy so you have something to compare. Be sure to ask as many questions as you need to and take the vehicle out on a test drive. Never buy a car without driving it first.