look for opportunities to roam. in a skirmish, peel for your ADC, this means body block blitz grabs, and focusing the same target your adc's focusing.use cc if you have it, try to use it at key moments tho that's a skill to always work on. avoid dying, altho be aware of shutdown gold. don't engage when the enemy's minion wave is large. when ganked, look to learn when you want to try to focus the enemies one at a time and fight and when you need to hightail it back to the tower.
look for vulnerable moments, altho in low elo no one jumps on those: when a support leaves lane to ward, you might be able to cut then off or five their adc. if one backs, especially in a bush you've warded, you might have a chance to jump the other the second recall finishes. if you got three or even two high health teammates itching for a kill and they have one mid health or lower hugging turret, it can be worth aa dive, tho at low elo your allies aren't gonna be on the same page. if you five get used to how many tower hits you can take before leaving, sometimes it's just a matter of forcing the tower to target you then stand on the edge tanking a few hits while your ADC finishes the job.
mid game look for picks with your jungler if you can. ward the river and keep an eye on your map so you can warn your farming arc when someone coming, but don't leave them 1v2.
sometimes when they're farming you gotta be there at they're side to provide a zone of support so that the event can't poke or five your ADC without you counter engaging. be aware of cooldown's, when thresh hook is down be aggressive on them when your abilities are down you are vulnerable. be aware of level and item advantages.
if both the enemies recal, your ADC might try to push lane, help them do that. fall back once you push the lane to the tower, perhaps recall also.
think about dragon plays. don't force dragon without your jungler, danger ping if your allies are low or the enemies are on their way from base because the call took too long to make.