ZED MAINS HELP ME, I MUST LEARN FROM YOU MAJESTIC BEASTS

Like it says in the title I would like some advice from experienced Zed players. I started maining zed a week ago (I had played him before and he was always my favorite champ). Currently, I am sitting at mastery lvl 6 with 44.8k mastery points. Although I get positive scores in the large majority of my games and usually do quite well. I seem to lose... a lot, and I don't know why so I was wondering if you guys would have any tips for me, I also don't split push a lot so if that's something I should start doing more I will. Apart from that, I would just appreciate some advice. Thanks.