First of all: congratulations with your PPL!
That said: take it for what it is worth. It is a license to learn, and nothing more. It is a formal declaration that you have learned enough to be allowed into public airspace without necessarily making yourself an unacceptable danger. Your real learning can indeed only begin now.
Do begin your real learning, and enjoy it! Your first step should be to consolidate existing learning. Do again all the exercises you did with your instructor(s) and do them again and again, in various weather, with various amounts and directions of daylight. And do not forget to enjoy all that!
From there on, you can begin to expand your horizons. That will come naturally enough, but probably slower than you now imagine.