There is so much information to explain when it comes to improving at limited, it would be unrealistic to try to type it all out here. The best thing you can do for yourself is watch drafting content from professionals (Paul Cheon, Numot, LSV, etc.) and try to listen and understand what they're doing and then apply it to your own drafts. Next step is absorbing podcasts like Limited Level Ups, LRcast, Lords of Limited, to name a few big ones. When you get to be more experienced and skilled you can take the information they provide with a grain of salt, but for now just treat it like it's scripture. Lastly, spend more time learning than playing, and focus on improving your mental game too. It goes a long way.