If you don't have time it makes sense to avoid the raid but otherwise it's as simple as watching one of many YouTube videos on how to complete each section of each raid. Crota can be mostly soloed but is great with a team. VoG is the best part of destiny and should be played by everyone. Patrolling and strikes and weeklies are terrible when compared to VoG. Watch a walk through and get in there, you only really learn if you try it out.