You want to make it a cascade, but you removed all branches that could be used for cascading branch? Now that is not any option anymore. Frankly, there are not much options left at all.
We have all done it at some point. Itching beginner fingers just want to do something bonsaiisch to the tree. But bonsai is a maraton, not a sprint.
Now, please stop. Do absolutely nothing more for a few years and read up on bonsai styling. Make a long term plan for the tree. But most important, put it in the shade and focus on recovery.
Please update on the status of the tree in a year. If it is still living or not.