There are preliminary courses or classes that show you glimpses of how to become a police officer. Most students that are inclined towards this sort of career would be interested enough to study these courses and gather all the theoretical knowledge they can well before joining the police academy. Of course, the practical part on how to become a police officer is not going to be a breeze. There is a lot of hard work that goes into it and it all centers around the goal. The theoretical understanding will definitely give you an edge. It helps to know what you are getting into so that you are prepared. Nevertheless, there are many that drop out of the course midway because they just cannot handle the hard work or the pressure to succeed gets to them.
Learning how to become a police officer is one thing. But, actually becoming one is a whole different ball game. Only the best of the crop make it and even they go through their entire career dealing with unbearable pressure. Many of them even burn out in the middle of their career and have to opt for a tangential career in law and enforcement. Visit this site howtobeapoliceofficer.org for more info.