League of Legends (LoL) Question: talon

If you want to know how to play Talon then you can check out his guides found here. There are lots of guides for him that explains what you're looking for.

For Talon, abuse your q kill to apply pressure and get closer to your enemy laner especially if it's mage, because when you q on a minion and it dies, the cd is half so pretty much; You q on a range minion, it dies and you w on the enemy laner and if they do stay, your q will be back up for the gap closer for a kill. Make sure the enemy laner can't punish you when using q on a minion, like Ekko, he can e q and auto then run out because he knows you have no q for the passive so use this only if you know that you can apply pressure and won't be punished by it.
and once you are 6, if you are confident you can kill the enemy laner, go for it with the flash and ignite. another tip considering with the passive stack for talon. Once talon gets one stack from anything like example his W, you should all in with q and ULT (MIDAIR) for your q then auto on the target to proc the passive, electrocute and ignite for a free kill. Most mid laners don't know about this so take advantage of talon's passive and q and ult mid air.
To carry,just roam a lot and help out your team. Be the first one to gank or follow up with anything. You should always follow your midlaner for any fights, UNLESS you know that the enemy midlaner can't do anything or make out of anything from the roam because your bot side or top side doesn't want to fight and has lots of vision. If they can;t get anything, shove hard af then maybe catch the midlaner alone in the jungle or roam somewhere else maybe finding the enemy jungler. The enemy midlane will lose exp and gold from you shoving too.

To carry you need objectives and kill the most threat in their team, make sure to end the game fast so get dragon, turrets, and baron since Talon falls off kinda hard compare to others. And don't int for a kill especially if you are fed, unless it's actually worth it considering the gold, the bounty you have compared to them and what they are missing out, like killing a fed adc right before dragon responds is a good for 1 v 1, You eliminate the strong threat they have and your team can now get dragon easily.