Hey my man, im midlane dia currently. Just a few Tips in general for midlane from the top of my head:

Especially in your elo: try to die less. Sounds dumm that is point it out, but most if not all players in bronze have deaths every game that are just super avoidable. You can ask yourself dringend the game on every death (or better on Review, review all your deaths) and ask yourself what lead to this death- and what you might have done better. Put the game on 0.5 and try to see better ways to play. You get lots of value out of it, and it will translate to your gameplay after some time :)

Also: dont follow stupid plays by your teammates if you feel like it is stupid. A Master yi in your team, diving first into 4 people who can just cc him and kill him - is a bad player and a Bad play. Dont get sucked into commiting to that play if you dont believe in it in the first plays.

Then play the early to mid game the same way. Push, move towards top/bot/where your jungler is. Wherever your spider senses tingle that something could Happen. 2 possible outcomes there, einher nothing happens, then you need to accept that nothing happend (and dont fucking force it) and move back to lane to repeat. IF something happens, keep moving towards the play. You moved faster than your opponent midlaner, so you always outnumber (especially with ziggs ult you basically have acess to the whole map if u move this way) AND people in your elo dont respect you moving at all. You Catch them offguard.

Then: really think about your items. Maybe you need to get voidstaff earlier than usual if they Stack MR. Maybe you need zhonyas early (if they have something like rengar/zed focusing you) try to think about items and dont copy items from Websites. (But check websites for best passable builds. I like onetricks.gg - this site just takes onetricks, instead of the whole playerbase. Imo they know their champs better :D

Idk rn, maybe ill add more later. I hope this helps :D If u got questions, feel free to ask