Be patient, these things come.
SS works and the beauty of it is in its simplicity. Just take it steady from day to day and don't get greedy with the weight increases. How much did you improve from your starting weights?
I have little interest in mass gain these days because I no longer compete in a sport that requires me to be hyooge, but I do believe that people who have got decent numbers in the weightroom look like they have decent numbers in the weightroom.
Do you still live with your folks? Are you eating them out of house and home? You could get a part time job. Milk isn't that expensive, certainly in comparison to some of the rubbish we can spend our money on these days.