Like was mentioned above, do a search on this site. We have had this conversation several times in the last year. Basically, this industry is hard to break into unless you know someone who is willing to give you a chance to get started. It's the same catch 22 as most aspects of flying. If you are really serious about doing this kind of work, get out and talk to local operators, go to industry conventions, subscribe to insustry mags, get all the tailwheel time you can, and don't take no for an answer. You will hear that it can't be done many many times. There is always a way if you are willing to work hard enough for it.
If you have any specific questions I would be happy to try and answer them.