https://www.chess.com/blog/TheMonkPlayingChess/the-first-step you can read this , this may help you
it has all my experience , tactics and tricks i used to increase my rating .
further if u have any queries u can comment in the blog or reach me directly
I need a few tips getting good at blitz.. i suck when i have to make quick decisions and it kinda puts me down. Sometimes openings are too tricky as well. generally while playing im always down on time be it blitz or rapid. Need to improve on that.