Disclaimer -- most of this is my personal opinion.
So I guess that there is a chance that I could get a job at an IT technical store if I know HJT?
Yes, but keep in mind, most business owners are not
interested in cleaning a machine if it takes more than an hour or two. It's too easy to just format the thing.
Chances (from my experience) largely depend on your age (my primary barrier is that I'm a minor), prior employment experience, and expertise in other fields, like hardware. Remember that at a repair shop, 75% of the work you do is hardware related -- diagnosing a failed system, replacing parts -- that sort of thing. If you cant take a system apart and put it back together (all the way, I mean motherboard out of the case and all), then that's a skill that would be good to have before going into such a field (READ: Do you know how to use a screwdriver?
). It's not difficult. Every connection is color coded and keyed. You can't put something in the wrong way, you cant put something in the wrong plug 99% of the time (At least since we threw out the AT standard). Play around on your own system if you don't believe me, or see if you can get ahold of a junked machine that no longer operates so you can practice dealing with the pieces if you've never worked inside a PC case.
Prepare to deal with a LOT of dust
If you know what you're doing, the hardest part is getting your foot in the door. For that, your best tool is a resumé. Print it on bond paper with a laser printer if possible, if not at least use good paper and "High Quality Mode" on your inkjet. IT Shops want to see a professional image. Geeky-ness around the edges is okay, but when needed, you have to deal with clients and other businesses, and professionalism will go a long way toward getting you in such a position. Dress dressy. Even if you don't anticipate this attire for day to day operations, wear a suit if you have one. At least shirt and tie. It all plays into the professional image. Once you have secured the position, you still don't want to be wearing "I'm with Stupid" tee shirts, but you can dress more casually. Copy typical attire of other co-workers (if present) or your boss (if no co-workers).
I think most of this applies (no pun intended
) to all job hunts, but I mention it just in case.
Finally, apply to lots of places! Make say -- 5 copies of your resumé, and go to more than one place. You may get lucky with your first shot, but you obviously have a higher chance of success. The yellow pages are the best place to start for potential employers in this business, at least for me
Oh, and one more thing -- Don't go to work for GeekSquad or I'm going to have to kill you
Hope that helps,