Here’s a corrected and slightly polished version of your writing:
Yesterday, I was able to knit a garment without worrying about anything or getting distracted. Then, I realized how much knitting has saved my life.
First, it clears my mind. Recently, I’ve been learning English seriously and making it a habit, so I focus more on studying than on my free time. I find it hard to stay focused on the present moment. Knitting, however, refreshes me.
Second, it brings me joy. I’m currently making a muffler, and it’s almost finished—I only need to knit a few more rows. When a garment starts to take shape, I feel a sense of confidence and happiness.
Knitting is like meditation for me. It suits me well, and it makes my life better. The yarn and needles calm me down, and seeing my finished work makes me smile. Sometimes the patterns are challenging, but it’s worth the effort. I really enjoy knitting.