Crocheting a hat is something so simple that even a beginner can do it. This hat in particular only requires the knowledge of working in the round and double crochet. As long as you can do that you can make a slouch hat* in no time at all.
*There has been some confusion about the name of this hat. In the knitting/crocheting community it is commonly known as a slouch hat but many people know it as a type of military hat. This crocheted hat is not meant in any way to disrespect the military version but it simply shares the name because of the fact that it slouches.
For more information on the military one you can go here