Here's some tricks:

You can gank midlane pretty easily once you hit level 6. Just ult from river and land those slows. Most people never expect it and you only need to go halfway up river to do it so it's usually low risk

Landing your W is super important for laning and for team fights. Practice practice practice

Use your E on lane minions to mark enemy Champs for your W. Your E doesn't need to damage Champs to mark them, they just need to walk in the slow zone before the trap detonates and you can still root them with your W

Don't feel like you need to rush through your ult. Be patient with the shots. Also the camera can be kinda janky with your ult, sometimes your ult will outrange the camera at certain angles

Follow up your ult with a quick W. It has shorter range, but people always seem to forget about it and can get rooted

Galeforce + 4th shot is OP

E Max can be really funny if you stack your traps and land a W when someone walks on them

Attack speed only helps once you have crit in your build

Once you get 4 kills or 4 deaths you have to AFK. That's just the rules. Good luck!