least you have an idea what you don't know now.
hardest thing for new teachers to deal with is they don't know what they don't know. takes at least a year for the veteran teachers to help them figure out how much they don't know. i knew a lot of students that could do a ton with a pc, more than me in some areas. i spent time with them trying to figure out what we could do that was not illegal with that knowledge. mostly the answer was to swap sides and help the good guys keep folks like us in check. but to do that you do have to know the dark side so to speak.
i still pay a lot of attention to certain things i no longer actively use. but knowing they are out there and how they work helps me in my day to day keeping other people's pc's safe and running smooth.
my school ran windows pc with smart boards. was a good combo that let us basically have a giant tablet on the wall. nothing like a touch screen whiteboard to really let me have fun with lessons. i taught math (as name suggests) and you got to do anything you can to make it slightly entertaining.