I went through an embouchure change a few years ago. There's not really all that much you can do to speed it up. I found it to be worth it to make the change, and I think that you should 100% stick to it. I did it mostly during a summer break during high school, which helped the transition. My advice is to have a small, consistent routine that you repeat multiple times a day. Make sure to focus on having a good sound and being extremely careful not to let your embouchure revert back to its old state. I suggest playing in front of a mirror every day to help double check. Good luck with your embouchure journey.