I just jumped back on a machine after 7 years and I've found the best source of information is on Youtube. I guess if you are just learning you don't really know where to begin but I would suggest working on CMM Theory and Alignments and continue to practice them until you understand how to constrain a part properly. After that go through all your menus and research what those options are capable of doing. I find the Training Manuals do help but depending on what you are doing they don't apply in a lot of scenarios. I never use Clearance cube or clearance planes for example, every programmer is different! The people on this forum are great at answering questions too, dont hesitate to ask! Goodluck!