Nowings,
Welcome to the site.
My advice would be to try to gain employment at a 3rd party maintenance facility before trying to land a job with the airlines (although trying never hurts). Some of the places fadec mentioned are excellent places to really learn commercial jet aircraft inside and out. You'll have a better understanding of aircraft systems, structures, and avionics. Mainly because you tear down an aircraft to almost bare bones and then reassemble it when the work is complete.
I first started out at a 3rd party MRO. The experience was invaluable. When I was ready to move on to the airlines, I had very little trouble transitioning onto aircraft I hadn't worked on before. I have seen people come into the airlines with little or no experience and struggle to grasp the work they were trying to accomplish. Plus you'll work with confidence once you do land that airline job.
One last bit of info, with your level of experience, you are more likely to get hired on by a 3rd party MRO than with an airline. If you looking to start working right away, this might be the route you should take.
That's my advice. Hope it helps you out.
Al