All the times I practiced crevasse rescue in student rec centres, abandoned lecture halls, back alleys, and on the balcony of Keiths Hut I was never able to actually understand what I was doing. But when I went aid climbing I was like "Holy shit1 This Z-pulley really works when you are hauling! These ascenders are way better than prussiks!"
So I'd say forget about the crevasse simulator and just go do a 2-pitch aid climb. The fundamentals are the same and it will be more fun.