Ohthemaya,
As a beginner, there are a few things which may be helpful to understand. The first is that all of the postures that have been used for sitting meditation have a scientific function. They were intended as helpful tools to induce a meditative consciousness. If you adjust your body in a particular way, this can help to create a certain atmosphere in the mind where meditation can start blossoming. For now, when sitting, try to sit with an erect spine. This will help the electrical signals to travel more smoothly to the brain, and will create a mental attitude of being attentive. But the physicality of it is really not the essential thing, what is essential is your inner space. You can sit in a perfect posture, motionless like a statue, but within yourself there is a great storm happening. This is not true silence. The first thing that I would suggest is to come to a thorough understanding, one which is without a doubt, that the spirit of meditation lies in your witnessing. Whether you are concentrating on your breath, a mantra, a yantra, a chakra center, it is not very much relevant. What you are witnessing is not relevant, the object of your concentration is not relevant, what is relevant is that whatever you are witnessing, to witness things in the moment with neither attraction nor aversion, neither liking or disliking, without judgement. The moment you start becoming clinging to whatever you are experiencing, you have lost your contact with the Witness, your clarity has become clouded. When witnessing the breath - when you see that your mind has become distracted from the present, just gently notice it and bring your attention back onto the breath. Allow nothing else to enter into your perception - just a steady, unbroken, one-pointed stream of concentration onto the breath. Practice consistently, everyday if possible. The minds programming will not cooperate so easily, it just wants wants to follow whatever has been written on it. So don
t expect from a single sitting, that you will see some kind of great change. It needs consistent practice - even if it is just five minutes a day, but five minutes of sincere and whole-hearted involvement.
Eventually, with consistency, if you have been practicing in the right way - one day your concentration will transform into meditation. The mind will become silent by itself, without even your doing anything. It will be a spontaneous silence, coming without any warning. That is what meditation is - it is a silence of the mind which arises by it`s own nature, you cannot do it, you cannot force it into existence. The only thing that can be done with your effort is to prepare your inner space for meditation, but meditation itself is an effortless happening. Practice. Time is short, and flies by like a flash of lightning. Everything in life is in a constant state of change, the river is always moving, nothing is permanent. Seize this rare opportunity of human birth to enter inwards and discover something within you which is birthless and deathless.