Barewire's videos should really do you well. He's a very solid winner in today's heads up cash games (much different from 3-4 years ago when anybody with a pulse was jumping into games and finding clueless fish around every corner) and he's been a very reputable coach for years. Given what some of the other people with much less experience and no recent winnings are charging for heads up cash packages, I'm extremely proud to have his packs on our site.
Of course I'm biased, but you can look at the reviews under the pack, his recent stats, the reviews on his videos in the premium pack and ask regs, he's the real deal.
My only other recommendation might be to take a look at any Phil Galfond heads up videos, but those can come after Barewire's stuff, especially since you're just jumping into heads up cash now.
Let us know how you get along with the packs and the change of game.