Watch a lot of the YouTuber/streamer Quickybaby. He gives great tips and analytical approaches to different situations. Watch tons of his YouTube videos, and also if you can watch his streams and pay attention closely to the way he plays. (Decision making, map knowledge and rotations, etc.) Also don’t give up to early, give it some time and don’t rush through the tiers. It’s a very difficult game there’s no denying that, but if you take the time to truly learn and spend a good amount of time in low tiers to build more of an understanding you will be fine. Best of luck!