Okay. One thing you could try is focus on it one chapter at a time.
Looking at unneeded adverbs can help shortened down the word count. Also repetitive description or use of too much can help cut that down.
Judge every line. Every sentence structure. Always think about which things are the most important vs the least important. If there’s a huge description for something that isn’t too important, judge why it has a massive description and if it’s relevant.
Things like this really help make things easier. But in doing this, it’s easier to take one chapter at a time, and don’t be afraid of spending an hkur or two focusing on that.
If you want to go through your whole book woth edit sprints, you could always focus on one thing. Say with one run, you focus on useless adverbs, then the next time descriptions etc.
Also overuse of dialogue tags is a good one to look out for too
I hope this helped somewhat and good luck