The answer to the OPs question is NO, it's not that complicated, if you have a short, fair weather-only commute on MUPs and city streets.

However, if you regularly have a long commute, in all weather, at night, during all seasons, in traffic, carrying your gear to and from work, etc., the answer is YES, it is actually fairly complicated. There are so many options as to bikes, clothing, equipment, technique, and so on.

By all means, start commuting by bike. You'll get some good advice and some bad advice here, and from fellow commuters you meet along the way, and you will learn what works for you with actual experience.