* NEED ADVICE BAD* I'm confused, and I don't know what to do

I'm debating the whole postal job now...I don't know what to do. I dont know about taking the postal job. It has its benefits but it has it negatives too.

I have to work all weekends, saturday and sunday, all holidays, including christmas and new years, and on my days off they call you and ask you to work...If you say no that is looked at as bad.

The benefits are good dont get me wrong...but I keep asking myself do I really want to work all those hours, outdoors in the extreme cold and the extreme heat.
What do you think I should do? I am still thinking about going back to school for computers, fixing and maintaining them. I like working on computers, and Danielle thinks that would probably be a good thing for me. I agree with her. I don't know about the whole postal job. I am really confused. I don't think it is a good sign that I am so confused. If it was something I wanted to do I wouldnt be weighing the pro's and con's all the time.
Forget about going on vacation for the next two years....Danielle and I are planning a 1 year anniversary trip. We wont be able to do it. You have to be accessible for the first year of employment...In case they need you to work if someone is out sick.....
I don't know what to do. I just printed out the Farmingdale University brochure and I see they have a computer BA Degree program tat looks interesting.
What do you think I should do? Do you think I should skip it this time, and if I want, I can always take the test again....If I decide I want to do it.
Please help me...I am so confused.
Thanks,
Scott