In a sololane ideally you want to let the enemy push the few first waves into you and just farm defensively. When you get enough money for Tiamat, buy it ASAP! you will get lane pressure and much more kill potential. Early game killing people when they try to dive you is super easy, Pyke is often underestimated in toplane matchups and most players will try to dive you early if you bait them when you are low.
Taking poke and dropping to low health is a fantastic way to get your enemy too close to your own tower to just hook them and stun them under tower for an easy kill.
Getting ganked is also a good thing on Pyke because of the huge outplay potential you have, if the jungler ever comes too close you can just hook them behind you (preferably under tower) and stun them with your (E).

You want to position yourself on the bottom side of the lane and stay close to the bushes at all times, they work as your personal healing spots for when you take damage (always keep the enemy side bush warded).
I would suggest asking your ADC how aggressive they want to play the lane and adapt to their playstyle, if your carry just wants to farm, then just look for poke here and there and keep chilling in lane (make sure you are warding river and keeping tabs on the minimap).
However, if your ADC want to play aggressive then look for any opening for a fully charged q and try to stun and all-in the enemy at all times, though this playstyle will make you more open to enemy ganks.