Try to complain less, be thankful for what you have. It is proven that people who always keep complain, can never be calm.
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If you always take your every thought seriously then youcan never be calm. Try to stay happy and chill, by taking things lightly.
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By looking for validation from others, you are simply handing over your key to happiness to others. Try to stay happy by yourself.
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Always being consious about yourself and thinking about oyurself is not good for your mental calmness.
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Try to forgive yourself and your flaws by accepting yourself as you are. This increases your confidence as well as calmness.
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Try to focus on your goals and dreams, this keeps you busy by giving you something to achieve.
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