Khloe Kardashian is having a hard time “processing” the fact her daughter True has started first grade. The Good American founder’s six-year-old girl is growing too fast for her mom, who admits she is feeling a “strange mixture of loss, anxiety and fear” as her daughter embarks on the big milestone. She posted to Snapchat: “It’s always such a rollercoaster of emotions when True starts a new school year. This year is a big milestone for her… first grade. “I’m not going to lie, I am having a really hard time processing the fact that she’s going into first grade.” She continued: “There’s this und…