do you recommend some where to get some training
Save yourself the time looking all over the place to learn about gcode etc.
Just buy Peter Smid's book CNC Programming Handbook, read the first 125 or so pages and start studying it.
If your trying to use LazyCam then read the manual for it in Member's Doc's. You may want to play with the wizards available.
Cambam won't break the bank and produces good code.
Enjoy the learning curve.......