I won't tell you how to meditate because I am a beginner myself. But I will tell you to meditate, somehow in whatever way you find, whether by yourself or as part of some group. What this does is to teach you to quiet down an overactive mind and to clarify things that are important and things that aren't.
I am sure I am a lousy meditator, since my mind wanders everywhere. It doesn't really matter, because the more one does it, the less meaningful that kind of value judgment becomes. If you observe that fact that your mind is especially busy one day, that too is useful information. You don't even have to try to quiet it, in fact, you just observe the fact that it is busier than usual and it will quiet itself to some extent.
Probably the biggest predictor of whether your life is good is the quality of thoughts in your own mind. If you are tormented by negative thoughts night and day, you are not happy. The point of meditation is not to eliminate negative thoughts, but to be more accepting of them and taking away some of their scariness.