I have seen some shocking practices from people who were instructed at TAFE, such as outdoor ed instructors. Rock experience is very difficult to come by and simply takes time; I've always maintained that learning how to climb is just surviving for five years. I set the bar a number of times for tremendously stupid mistakes.
That jump is only 2 or 3 meters. You just sit on the slab and gingerly scoot down until you're about to slide off then go for it. If you clip the arete on the right you're toast. It's way easier than downclimbing that slot.
You present as a nice enough fellow that I'd do a route or two with you anytime should you be keen.