The key points of practice are:

• sequentially relax body
• recentre the mind to here and
• return attention to rest on the breath
• attention is not too tight, not too loose
• enjoy rather than perfect - the improvement will happen as you take it nice and easy

You're beginning to develop and sharpen your attention by using the breath as the object. This is called training to develop Shamatha.

Shamatha is a Sanskrit term used by the Buddhist tradition. It is often translated as the "tranquility of the mind", or "mind-calmness". Shamatha is one of two qualities of mind which are developed in meditation, the other being vipassana (insight). 

As your attention improves you will sense more stillness, peace, and clarity of mind. This eventually becomes the place to return to and live from - your grounding or center. As the turbulence in your mental activity settles, the natural peace, presence, and possibility of your mind/consciousness will reveal themselves to you. You are do not need to add anything else.

The innate characteristics of peace, presence, and openness to possibility will avail themselves for you. As the relationship with yourself becomes peaceful so too will the loving presence that you bring to your relationships with others. You will naturally see many more possibilities for how to authentically show up, serve and prosper in the world.