It's a numbers game, man. You have a base rate. Start sending out an application per day. Eventually you'll find you can do 2 per day, 3 per day, etc. One day

It's a numbers game, man. You have a base rate. Start sending out an application per day. Eventually you'll find you can do 2 per day, 3 per day, etc. One day you'll have sent out 100s of applications and get proportionally more interviews (assuming the base rate holds).