10 seconds is too long for the espresso to start coming out, and the water left in the basket indicates it couldn't all make it through. So a coarser grind will make mean the water can come through easier, don't worry too much about the weight of the coffee going in, you can go down to around 16 and still get a good result
10 seconds is too long for the espresso to start coming out, and the water left in the basket indicates it couldn't all make it through. So a coarser grind will make mean the water can come through easier, don't worry too much about the weight of the coffee going in, you can go down to around 16 and still get a good result