Preparation:

Choosing the right place: Finding a place that enhances your meditation quality is important. The place should be calm and peaceful. For example, sitting under a tree in nature surrounded by birds singing is a good place because it calms your mind. You can do it in your room. A small corner in your is okay, but if you have an extra room, use it.

For beginners, it is important that the place should be void of external noises such as traffics, TV, people taking, etc. That's why early mornings are preferred for meditation.
There are some noises you can't have control over such as a dog barking on the street. It is good. It can be a wake-up call if you are lost in thoughts while meditating. Become aware of it and accept it. Notice how it stops bothering you when you accept it i.e. when you stop giving it the power to bother you.

Get comfortable: You are comfortable when you are able to forget your body. So

Wear loose, comfortable clothes. If you are outside or can't change clothes, do your best to make yourself as comfortable as possible.
It doesn't matter whether you sit on the ground or a chair, that is not the point. So choose whichever is comfortable for you. But sit with your spine erect.

Set a timer:

When you are meditating, you don't want to be thinking about how long you have been meditating. So decide beforehand how long you want to meditate and set a timer for it.
For a beginner, it is helpful to start off with 5 or 10 mins. If you are very motivated, start with 15 or 20 mins.

Meditation techniques:

Sitting meditations:

These are also called passive meditation because they do not involve any physical activity. They are all about awareness, watching the mind, breath. They look simple and since they look simple your mind might tell you that not worth your time. Be aware of this deception, many people fall into it. 1. Watching your breath: It is also a form vipassana meditation. It is through Vipassana that the Gautama Buddha became enlightened. It is very simple and is the most basic meditation out there. It is prescribed for beginners because meditation requires a certain degree of concentration. It can help you develop that as well. But it is a really a meditation technique, not a concentration technique. how to do it?

Sit comfortable, gently close your eyes. Let the normal breathing happen; do not try to control your breathing.
Become aware of the inhalation and exhalation, watch the breath touching your nostrils when entering and leaving your body. Don't pressure yourself to concentrate on breathing; this isn't concentration. Be comfortable, just let your awareness fall on it.
Thoughts will come, emotions will come. When it happens, stop watching the breaths and start watching the thought or emotion that has come.
Your primary object of watching is breathing. But now some guests[thoughts and emotions] have come, So watch them, see what they are, don't comment or judge or do anything, simply be an observer. Once you finish it, return to watching the breath.

For a beginner, it is very common to lose attention, so don't be disappointed. With practice, you can master it. 2. No-mind Meditation:

"When there are thoughts, it is a distraction. When there are no thoughts, it is meditation"-Ramana Maharshi