How does a DMP impact my credit score in the beginning?

There should be no meaningful impact if you have maintained on-time, minimum payments. If you already made late payments prior to the DMP, the credit damage has already happened.

Resolve recommends SoloSettle

Resolve partners with SoloSuit which provides a debt settlement tool called SoloSettle. If you are being sued for debt, you can use SoloSettle to get it settled quickly.