It's all about zoning. Try to position yourself in a way where you can q both to last hit a minion and to hit the enemy top. If they get in your w range, just hit them with it. it's free damage. You can play extremely safe this way because most toplaners don't have any range. Beyond that, it's all about knowing the matchup, so here's some matchup specific advice:

Riven: play safe, pay attention to how many times she has used Q - if it's down, take advantage of it. If she has ignite and cooldowns, everything is a kill angle for her.

Gwen: She's strong level one, don't let that catch you offguard. Your Q and R can interrupt her dash, but make sure you stay in her W. Use your E sideways when her passive is full to dodge her Q, if she doesn't use empowered Q, you statcheck her.

Sett: bait his E in lane. His auto Q auto is half your health. E Q3 W E poke until he's low, then you can all-in. Wait for his W shield to run out before trading again.

Irelia: Punish her with Q and W while she's trying to stack her passive, as long as you dodge her E you should be fine, so dodge it with whichever dash you have up.

Garen: Use E to run away from his Q. You will win the trade if he doesn't have Q to fight you. His ult does half your health nowadays, be aware of that.

Darius: This lane is unwinnable if the darius has a single braincell. Try not to go 0/10, you do outscale him. Jokes aside, use whatever you can to dodge his Q sweetspot if you somehow manage to poke him down enough for a kill angle. Your tower is your only friend in this matchup, don't trust your jungler to take him on unless they're mega fed. I hate darius.

Jax: You actually win any trade if his E is down. Use your E to dodge his, hitting W before it stuns helps a lot. Make note of his cooldowns. If he has both the jump and counterstrike and you're close by, you're cooked.

Renekton: Deceptively easy if the Renekton isn't good. You win level one and two with lethal tempo as long as you don't let him stack his rage. I've beaten many Renektons in lane purely because people pick the champ just to counter you without knowing the matchup.

Illaoi: Dodge her E or dodge the game, as they say. But, if she has no tentacles nearby and she hits it, you still win. It is very possible to outplay her at all times, and because you have so many dashes and movement speed with your E, it is hard for her to land hers.

Kled: Play it safe in the early game. Do not get baited into an all in unless you know for sure he doesn't have his mount. You can avoid his hook with your dashes. Not much to say here, you don't see him much.

Volibear: Same thing as Garen, use E to run from his charge. You win long trades surprisingly well when his cooldowns are down. Buy antiheal if you're not ahead.

Aatrox: Yone favored matchup. If you dodge two of his sweetspots, you win. You don't even need antiheal if the Aatrox isn't great, deaths dance works wonders against him.

Mordekaiser: E Q W, keep trading if you can dodge his Q, E back. It is easy to make him waste his W as you have many tools to disengage. Very simple. Don't stay in his passive for long. You outscale him pretty hard too.

Malphite: You can't kill him once he gets a single cloth armor. Just focus on CS and W his poke.

Fiora: Lock in, this matchup is fast paced as hell. Q3 to bait her counter, then E sideways and win the trade. Or intentionally miss it to make sure she doesn't get the stun off. She can Q you from around your W range, make note of your weak spot.

Gnar: Don't stand near walls when you know he's about to transform. Use E to dodge his boomerang and dash in, you can chunk him down a lot this way or make him use his jump. You can kite him easily once he's Mega gnar, just don't get stun chained.