I echo the posters above that say to stick with your current job for now. I worked in a transitional care unit for the first year after nursing school and hated it, but after a year, it was dramatically better AND it gave me such good experience in terms of time management---I had 10-12 patients in my step down unit. Ick! Anyway, I moved after a year to in-hospital gyn/gi/gu med/surg and again, hated it for the first couple of months (colostomies! catheters! crazy abdominal pain drug users/seekers!) but again, it got much much better, and really let me get my groove on and I ended up staying for 3 years due to the flexible and awesome management team and great, supportive coworkers.
Now I work in Labor and Delivery and can say resolutely that my earlier work contributed so much. And just for the record, AGAIN when I trained in, I felt awkward, scared, and lacked confidence, but now I'm back to loving it again.
And feministmama, I went back to work at 4 months, 12 hour rotating day and night and to be honest, it WAS rough at the beginning with my night shifts. I didn't prioritize my sleep enough at the beginning and had some really tough shifts at work and then total melt downs at home. We do what you are planning now---I give my babe to my husband at around 1pm and sleep from 1:30-4 or 5, nurse before I go and then head in to work that night and then I nurse when I get home and then hand baby back off to Dad. I ask that he give me a solid 4 hour stretch before bringing her in to nurse, so then usually around 12:30 or 1, we nurse and I then hand her back to Dad and sleep until 3 or 4. On my last day of work for the week, I often get up at that first nursing session, but then my husband will handle any early bedtime issues. And at first, when she was sleeping poorly due to the 4 month sleep regression, I ended up getting MORE sleep working nights than I did dayshift, since I got that 4 hour stretch and then usually another 3. After the first couple of nights, I had no issues sleeping during the day btw.
When I work day shift I try to spread my shifts out as much as possible---being gone for three 12s in a row ends up getting me a cranky, clingy baby by day three. But nights I can't do that--it's too hard on my body.