PiñonJ
Omono
Leo, this is obviously good advice, in general. However, as I've stated a couple of times in this thread, a young spruce fresh out of the nursery can take multiple insults in one season. I still have my first two nursery trees that I purchased eight years ago - a Picea pungens and a Picea abies that were in one-gallon nursery cans. I abused them horribly in my noob ignorance. I'm talking re-potting, branch pruning, trunk chopping, then shoot pinching, all in the same spring when I purchased them. They really didn't skip a beat. I suspect the OP's tree wouldn't mind a re-pot at all and the sooner it gets into bonsai soil, the better and it's not a high-risk tree, in terms of investment. The buds aren't open yet, so the timing is fine.This question was answered thoroughly by several people in page 2 of this thread. You cut a fair amount off in March of 2020. If you want a guarantee that it will live, do not repot until 2021. If you repot before 2021, the chances of survival will be lower. Might not drop to zero, but will definitely be less than 100%, probably closer to 25%. Might live, more likely might die. Death won't happen immediately, most often will just fail to grow in spring of 2021 because of being repotted in 2020 on top of being pruned in 2020.
But sometimes a tree will do something you don't expect. So I can not say definitively that it will live or it will die.
So, re-read page 2 of this post.