Hi,
Recommend you continue with your original plan. Take MD-100 exam next week as scheduled, then study for and take MD-101 before it retires in July. If I was you I would study for and take MD-101 ASAP, say, later this month or early May, just so all the information of MD-100 is still fresh.
Once you pass MD-100 and MD-101 you will have the certification, and then when they will retire you will have same certification as you would with MD-102.
-TP