The process of becoming a pilot is indeed a laborious and meticulous one. But first, let us get the terms right. An airline pilot comes under the commercial banner given that they are providing their services to private airlines but a commercial pilot need not necessarily be an airline one as he may be a cargo, backcountry or even a tour pilot. Thus, a commercial pilot is certified by the FAA to charge for his services while an airline pilot has to gain additional certifications among other things to be able to charter a scheduled flight.
Now, the process of becoming a pilot is very straightforward. You will have to be eligible in all aspects in order to be considered suitable to become one. The steps to be followed are: