Let me give you a clear idea of what you need to do.
Get up early in the morning. The more early you begin the process, the better transformation will occur in your life.
The first thing to do in the morning is take a shower and dress up well. Afterward, bring some fresh flowers from your home garden. Otherwise, some fresh leaves will also work. It’s time to clean your home temple with all the devotion and affection in your heart towards the lord.
In case, you don’t have a temple in your house, then you can choose a particular spot of your house which should be peaceful and clean.
Now lit an oil lamp in the temple. I’m assuming that you have a figurine of lord Shiva (Photo, idol) in that spot at an appropriate location. Now you can offer your flowers and leaves near the oil lamp and fold your hands in reverence of Shiva. Start chanting any Shiva mantra repeatedly for the next 20 to 30 minutes.
I know it is difficult for beginners as it requires absolute concentrated powers. Aum Namah Shivaya is the easiest Shiva mantra that you can chant.
While chanting the mantra with closed eyes, your concentration will definitely break down, and you will experience some trouble, like scratching your neck or hands. You can restart your mantra chanting practice once you regain your mantra and your concentration. Your motive should be to overcome your inner fears and challenges, which will try to haunt you.
These are the inner impurities or wickedness that are trying to distract your concentration. Keep chanting the mantra with your complete devotion to Lord Shiva. With passing days, your concentration will become stronger and the power of the mantra will start working in you. In fact, chanting the mantra will minimize the loss of your concentration power and unlock your hidden potential.
I assure you, after a week, your mind will feel more relaxed and concentrated and you will experience positivity around you.