Life In 19x19

i am losing every single game [...] never really played any games with others.

Are you or are you not playing against others?:) OC, you must play games. Also read relevant beginner books such as First Fundamentals and In the Beginning.

I havent played with others for like a year just started ...

Currently i am a kgs 13k, although i think i am lower since i am losing every single game pretty much. So i was going to ask how can i improve my games?

Note: I used to play often and was at a point where i could beat an 8k but probably a fluke lol. I've been doing life and death puzzles for like a ...