Popping a blister is a very bad idea, and this is the first thing you need to realize, but this does not mean that you cannot deflate the blister on your own; find a needle in your house, and sterilize it over flame (either from a match or a lighter), and then thread a piece of string through the back end of the needle.
Go through one side of the blister with the needle, then slowly work the needle through the blister until the point comes out on the other side; once the point has emerged on the other side, continue pulling the needle through so that the thread makes its way through the blister, and you will see that the thread is pulling out the puss from the blister.
Once you have used the needle and thread to deflate the blister, push around on it a bit to make sure all the fluid has been drained from the blister itself, then immediately put a bandage on the blister, keeping it completely covered for as long as you can. Once you remove the bandage (if you are lucky!), the blister will no longer be a problem – and soon, the tips of your fingers will be harder than they have ever been before!