Any advice?

Hello guys, I was a nova ranked player in csgo. I bought a new gaming laptop and started playing cs2. What should I do to improve myself? I sometimes play better than my rank sometimes very worse than my rank. I play 1280x960 streched in cs2 but the video isn't streched, I dont know why is that. Thank you.

https://reddit.com/link/1ga5jut/video/kjd4ltzhugwd1/player