CRNA Question

Hi, im new to this forum and actually new to the whole idea of nursing. See im a freshman at the University of Louisville, and I went in as a Pre-Med/Dental and I realized my parents basically pushed me into this, so this was a mistake for me because being a doctor just doesnt seem fit to me nor was it really my choice to go into this field of study. So I pretty much decided I'll switch over to a community collge next year and earn an ADN and work for some time to save money to go to a CRNA school [I know a year in the field is required anyway]. So, now that you know my story, I just have a few questions;

1) Would it be possible to go to a CRNA school with just an ADN? or is a BSN necessary? (im actually planing to earn a BSN after an ADN)

2) Just about how hard is it to get accepted into a CRNA school? (I know there is a specific GPA, but what else is required)

3) What is the cost of CRNA schools?

4) Im a guy, so I just wondered, do people look at you differently knowing that nursing is a female-dominated profession?

If anyone could help me figure these things out, it would be much appreciated. Thanks in advance.