We need to know more information.
I am presuming its a procedural approach airport.
Personally I would decend down to the 1800 ft unless the controller knows and clears us for a different level.
The airport safety altitude will be from the surrounding 25miles but over the field it will be less. The minimum hold levels will take this into account. If you don't decend down to the plate level the lowest hold level or the procedural out bound may be full for the next procedural approach. So if you don't descend seperation will be lost.
So personally I would head towards the MAP't and once inside the tolerances for the approach decend down to the given Alt and fly the missed approach profile.
There will be another approach which will be from 1800ft but will keep you away from the reason why you were at 2300.
You get it very occassionally that a direct arrival DME arc approach will be higher platform alt than the procedure from the overhead.
So we will need to know procedural/radar enviroment.
The other approaches and what they use as a platform height.