Failed my first midterm

I am so so so sad that I failed my first physics 140 test. Seeing the grade distribution today in class didn’t help either, and I feel like a failure (median was 20% higher than what I got). I don’t even understand why. I took physics mech in high school and got A first sem and B second. I even helped my friends study for this test. I went back and looked at Yuris key, and I honestly didn’t understand 3-4 questions, so I’m planning on going to office hours of one of the student led ones tomorrow. I’m really disappointed and upset, because this is my second time learning the content. My question is, how can I improve for next test? Should I ask the TAs and Yuri how to improve? If they can help me make a plan to study and do better on tests? Are there groups I can join that give problems similar to the test? I am very sad about myself please give me some recommendations thanks ;(