If you look for a guitar lesson online, there are number of them which are available free of cost.  But do you really know how genuine and effective they will be?  Some of them will appear to look as though they teach you incredible tips but you will discover later that they are not useful.  Once you land up choosing a “not so effective” easy guitar lesson, then you may cultivate bad habits while starting to play the guitar and getting rid of them later would be very tough.  Hence beware and choose a step by step effective guitar lessons online