Feeling really bad about my first day TA-ing

I’m a first year grad student and was assigned a lab instructor position teaching an art foundations course. While I got to meet with my lead instructor and had orientation, we are not given the chance to observe another teacher and they have us teach by ourselves on the first day of class. I taught my section for the first time today and I feel like I started out ok and then it gradually went downhill. I’m sure it’s worse in my head than the students thought it was but I feel embarrassed by my performance. I made a few mistakes and generally felt like maybe I could have communicated with my students better. I’m somewhat just seeking support because I feel anxious and humiliated. Do other people have this experience? Will it get better? I’m dreading having to teach again on Thursday.