You don't HAVE TO do med-surg for a year before going into a specialty. I started off in the ER, and I'm 10 weeks in. I give props to all med-surg nurses because I couldn't do it. The ER is hectic but I couldn't fathom doing head-to-toe assessments for 4-5 patients and do all that you guys do. I prefer focused assessment over head-to-toe.
Many of my classmates started out in the ER, ICU, OR, Mother-Baby, OB-GYN, etc...I only know of 1-2 that started in LTAC or med-surg.
Like you tho, I feel like I'm drowning in the ER but that's expected. All new grads struggle with time management and completing tasks in an efficient manner. My preceptor told me it's going to take 1-2 years to feel somewhat comfortable.