When you are just starting out with exercise, it is not required that you hire a personal trainer; however, doing so may be beneficial in ensuring that you have the correct form and technique. A personal trainer can look at you and your lifestyle and assist you better in creating an individualized workout plan as well as provide direction regarding how to advance your squats over the course of time. Hiring a personal trainer can be a worthwhile investment if you are unsure about your form or have certain objectives in mind for your workouts. On the other hand, there are a plethora of resources that can be found either on the internet or in printed books that can provide direction on the appropriate squat technique as well as training programs. It is truly up to you to determine which could be of greater use to you in the long run.