As my sempai and friend always told the kids he and I were teaching:
Learning techniques takes years and years of practice. But you can perfect how you sit in seiza, how attentive you are to instruction, how positive your attitude is, how limber you are becoming, how you answer sensei. In other words, discipline yourself in the formalities surrounding the art, and worry less about perfecting your technique yet. Even ukemi. Took me forever to feel comfortable rolling.
Give yourself the gift of time.