How to simulate pressure? You dont simulate it, you induce it 
For example when practicing drills you write down your results - that way your results matter. Or you may live stream your practice on youtube sharing link on your social media, the pressure will be definitely there, trust me 
Or you may even donate 10usd to chaarity everytime you dont beat the ghost or you favourite drill. There are hundreds of ways to make your practice time count pressure-wise 
For example when practicing drills you write down your results - that way your results matter. Or you may live stream your practice on youtube sharing link on your social media, the pressure will be definitely there, trust me Or you may even donate 10usd to chaarity everytime you dont beat the ghost or you favourite drill. There are hundreds of ways to make your practice time count pressure-wise