I have been meditating by myself since 2015 but nothing worked for me

Please help me, what to do. I've been meditating but not working for me anything. I get only tingling sensation on my forehead & constant buzzing sound. Besides, I have not gotten any slight improvements in my behavior. Would be helpful if someone suggests me following things. - How to meditate finally? That one method that can bring peace and calmness to me. - When to do ? Prerequisites. - How much to do?