I wrote a few weeks ago about the simplicity of making hemp milk. Another plant-based milk I've been making regularly is coconut milk, which is just as easy.
Add 3 cups of unsweetened shredded coconut to your high-speed blender. Pour in 4 cups of hot water and let steep for 5 minutes. Then blend on high for one minute or so. Let cool a bit if it's too hot to handle then strain through cheesecloth or a nut milk bag.
Store in the fridge for up to 4 days and shake before using.