I do this type of switch often, but usually for changing time zones.
How I do it is I start days in advance and I move the insulin injection to 2-3 hours earlier each day. I am sure to check often for lows. So one first day, take it around 7pm, on the second day, 5pm, one the third day 3pm, until you get to the time you want. If you need to make the change in fewer days, then you can move 3-4 hours each day, but REALLY check often so you don’t go low. You may also consider reducing your Lantus by 1 unit during this change to help prevent the lows .
When you do this, you really need to check your blood sugar often since you are taking the Lantus every 20-22 hours.
But I did this switch multiple times and it worked well for me.