Thanks for the photos. Now I can see what you have and don't have.
Your original question is about reducing buds but I think you need more than just reducing buds on a couple of areas of this tree.
For the shorter branches, thinning the buds is a great approach. That will give ramification as those branches develop.
I've marked 2 long sections of the tree where you have no side branches. Simply reducing the terminal buds won't usually do anything about that long, bare section. It will just give you a side branch and new leader way out at the end. More drastic action required there IMHO.
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Maybe the left branch I marked is redundant so won't need ramification but I see you've wired and bent the main trunk so I guess you see it as important in the future of the tree? It currently has needles all the way along so looks OK but in 2 years those needles will all drop off leaving you with a nicely curved but bare trunk with no side branches in that section. Is that going to be OK?
I would be cutting back well behind the new buds on the main trunk. Removing all new buds will force new shoots from the needle clusters back along your trunk. Those new buds will be available to develop more side branches in following years.
Hope this makes some sense.