We are in the same boat, it's been 40 years for me. Getting educated again is a real uphill battle. Been reading everything I can, searching the web and talking to people at the local field helps alot. Get lost in the abreaviations, new tech and new equipment. For now I have just ignored electrics altogether just to narrow the field a bit. Just reading what the transmitter will do gives me a headache. Good news is that prices are much better today than back then.