So many options. I could draw hundreds of different pruning options but I'm just wasting time if you don't like 90% of them.
This one removes some of the long, bare branches with no taper. It will take 5 years or more to regrow the branches with better ramification.
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This option leaves most of the branches. Just remove some longer ends. The tree will still have long, bare branches with little taper but might be a passable bonsai in 3 years.
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This option chops way back to remove all the long, bare sections. Improves trunk taper but basically start the tree again. Looking at 10-15 years to develop a good Jm from this hard chop.
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And those are just a few of the options I can find in a 2D photo only seeing the trunk and branch shape from 1 side.