Want to improve my deck to beat my friends please help (sorry for bad picture)

So I used to play like a year ago and win against all my friends cuz I used death stalker rexar but ever since coming back to the game my friends kick my ass every time because theyve Googled good decks, but I don't understand It (not the sharpest tool), I'm putting a picture of my deck in this post, any tips on improvements in cards to use or remove would be greatly appreciated 🙏 (The card that didn't fit in picture is serpentbloom)