I agree with BCS and wait a week from the day you got her to try feeding. You can use that time to research on these threads about feeding frozen thawed. Be patient and expect that sometimes she might refuse. Get a weight in grams (kitchen scale) on her so you can monitor if she is losing any weight. Make sure her humidity is between 50-60% and up to 70-80% during her shed. A good shed should be 1 complete piece. I had to cover 3/4 of the top of my enclosure with aluminum foil covered card board to up my humidity but I live in a low humidity area. I would also suggest getting a IFR temp gun to see what the temp is over the heat mat. Ideally it should be around 88-90% directly on the glass not on top of the substrate.
With all all that said you have a beautiful snake and she's lucky now to have owners that love her and want the best for her!