Not sure what to do!

I may be offered a per diem position that is only 8 shifts a month at a hospital I've really been wanting to work for! 6 months ago I took a job at a place I heard horrible things about, but took the job anyway for experience and to give it a try. Well it really is as bad I had heard and I am not comfortable there. However, the job I was offered at the nice hospital is not full time which is kind of what I need. However, the manger i interviewed with said its good to get your foot in the door as per diem and that she may have full time positions coming in July. I don't have children and I live with my sister, but still have plenty of bills and rent, etc. I originally planned to do both jobs, but now I'm learning that my current job might not let me take off for the full week and 2 day orientation required for the new job.

I hear great things about this hospital and would be amazing to work in a hospital where I could see myself in many years. Anyone ever find themselves in a similar situation or have any advice? I'm torn.

Thanks for reading all of that! :)