Welcome to SRP. You might get lucky and receive a keen edged razor. Perhaps with stropping alone the razor will be adequate without honing. The only way to find out is to try it. I would try it before taking it to your diamond plate.

If it turns out that it needs to be honed you could try it on the dia sharp and see how you make out. You may be a quick study and improve the edge. Shave test again and if it isn't sharp enough you might send it off to have it honed professionaly.

Here is a post by SRP founder Lynn Abrams that will help to ease you into straight razor shaving gently. Worked well for me to follow that advice.