We are working on some brew guides which will live here soon but for now here are some basic guidelines for our coffee.
Extract around double the weight you grind. So if you use a 20g filter basket then weigh out 20g of coffee and aim to extract 40g of espresso in around 25 seconds. Experiment with longer shots for different flavours and mouthfeel.
Use 6-7g of coffee for every 100ml of water. So for example on a 200ml Aeropress brew, use 12-14g of coffee. Adjust your grind for flavour and balance.
If you need more help/ideas there is heaps of great info here - http://brewmethods.com/