advice for A+ CERT FOR starting an ENTRY LEVEL JOB in help desk?

I was wondering if anybody has experience and knowledge they can share with me. I am working on my A+ while taking a year of computer refurbishing classes to get hands on experience. I'm doing this because I have no knowledge in computers and would be nice to be able to fix my own computer, perform updates, virus removal etc. I have also noticed there is a lot of hardware support desktop jobs. Some are contracts like 3-6 months, but the pay seems to be good, better than $9 an hour. I see some jobs for $15-20 an hour.

Anyway, I was wondering, I have looked at jobs and some say required 1-2 experiences in the field or in schooling and they will say things like trouble shoot windows 7 and XP, remote desktop to help people on the phone with there computer.. Isn't remote desktop in windows 7 configuration on learning? Or If I learn to be able to do remote I should be fine and not have to worry about the class? also, since i am new to learning and using a computer, A+ goes over windows 7 because of the year, so will I be able to work windows XP if I know windows 7?

I hope to start a entry level job by summer or Dec 2013 when I graduate, but afraid even though I have had hands on and will have a A+ cert as long with a hardware support cert, some companies probably wont hire me because I have no actual experiences in IT or help desk, but isn't an entry level for people who just finished school and are breaking into the Industrial?

I have worked a lot of jobs since I was 15 and I'm 33 now. I just got out of military and was doing infantry, but like I said. I have no customer service experiences because I always did jobs in soldering, ware house work, assembly stuff. Do you think this will hurt me at all interviews? I figured since i have enough money saved to let me go to school until summer with out working, to master the A+, so I will be confident and know what is going on or even answer interview questions, so the employer knows, hey, this guy maybe be breaking into the field, but he knows the common stuff, and later he can learn this and this.

I noticed some jobs say printer trouble shooting, cell phones and even some router hooks ups and mentioned a TIER 1 and active directories would be good to know but not needed. I don't even know what a tier 1 is or active directories are . And I will not get hands on for printer fixing in my refurbishing class for computers , but my A+ class hand book talks about steps to perform to fix a printer. do you think this knowledge will be good for a entry level or should i also learn windows configuration active directories etc, just know what is going on in a entry level job in hardware desk top support? I thank you for your time and any info would me appreciated.